Gk Question Answer Quiz English

Light Science Gk Questions Answers English

Top Light Science Gk Questions Answers In English For All Competitive Exams. You Will Read The Top Question And Answer Related To Light Science In This Post. This Can Be Asked In Any Competitive Exams, Must Read Once.

Light Science Gk Questions Answers In English

Q1.Diffusion of light in atmosphere is due to?

  1. Dhukan
  2. helium
  3. Carbon Dioxide
  4. none of the above

Correct Ans: A. Dhulkan

Q2. There are seven colors in light, what is the way of separating the colors?

  1. colors can be distinguished from plants
  2. colors cannot be separated
  3. colors can be separated with a prism
  4. colors can be separated by filter

Correct Ans: C. colors can be separated with a prism

Q3.Light is made up of tiny particles called?

  1. positon
  2. Photons
  3. atom
  4. Newton

Correct Ans: B. Photons

Q4.How will a plant with green leaves look when placed in red light?

  1. black
  2. red
  3. green
  4. purple

Correct Ans: A. Black

Q5.What type of wave is light wave?

  1. longitudinal wave
  2. both of the above
  3. transverse wave
  4. none of these

Correct Ans: C. Transverse wave

Q6.The color of an opaque object is due to the color it is given to-

  1. reflects
  2. isolates
  3. absorbs
  4. refers

Correct Ans: A. Reflects

Q7.Wave theory of light was proposed by?

  1. by Planck
  2. by Faraday
  3. by Newton
  4. by Huygains

Correct Ans: D. by Huygains

Q8.Which of the following color combination is most convenient during day and night?

  1. Yellow and Blue
  2. red and green
  3. orange and blue
  4. white and black

Correct Ans: B. Red and Green

Q9.Which of the following phenomena helps in deciding that light is a transverse wave?

  1. polarization
  2. refraction
  3. interference
  4. diffraction

Correct Ans: A. Polarization

Q10.Which of the following color has maximum wavelength?

  1. green
  2. red
  3. blue
  4. Yellow

Correct Ans: B. red

Q11.Who discovered the electromagnetic nature of light?

  1. Maxwell
  2. young
  3. snail
  4. Newton

Correct Ans: A. Maxwell

Q12.Which of the following is not a primary colour?

  1. red
  2. blue
  3. green
  4. Yellow

Correct Ans: D. Yellow

Q13.Who was the first to show that light waves are diffracted?

  1. Maxwell
  2. Focault
  3. Gremaldi
  4. young

Correct Ans: C. Gremaldi

Q14. The process of separation of white light from its different colors is called?

  1. diffraction
  2. character deflection
  3. scattering
  4. Display

Correct Ans: B. Character deflection

Q15.Photoelectric effect was rendered?

  1. H. Hearts
  2. Newton
  3. Compton
  4. Maxwell

Correct Ans: A. H. Hurts

Q16.There are three basic colors-

  1. blue red green
  2. blue yellow green
  3. Green Yellow Red
  4. blue yellow red

Correct Ans: A. Blue Red Green

Q17.Which of the following phenomenon does not occur in both light and sound?

  1. reflection
  2. refraction
  3. diffraction
  4. polarization

Correct Ans: D. polarization

Q18.Primary color is-

  1. Colors of the spectrum of white light
  2. Colors that cannot be produced by mixing other colors
  3. colors found in nature
  4. Colors of the Rainbow

Correct Ans: B. Colors that cannot be produced by mixing other colors

Q19. What is the bending of light from the edge of an obstacle called?

  1. refraction
  2. interference
  3. deflection
  4. diffraction

Correct Ans: D. Diffraction

Q20.When white light passes through a prism, the character which is less distracted is?

  1. purple
  2. Yellow
  3. red
  4. green

Correct Ans: C. red

Q21.Which of the following theory confirms the wave nature of light?

  1. theory of interference
  2. electromagnetic wave theory of light
  3. Newton’s particle theory
  4. none of these

Correct Ans: A. Theory of Interference

Q22.When white light passes through a prism, the character which gets distracted the most is

  1. Yellow
  2. sky
  3. red
  4. Violet

Correct Ans: D. Violet

Q23. What is the nature of light radiation?

  1. similar to both wave and particle
  2. wave and particle are not the same
  3. like a wave
  4. like a particle

Correct Ans: A. Similar to both wave and particle

Q24.White light is made up of a combination of how many colours?

  1. 5
  2. 7
  3. 3
  4. 4

Correct Ans: B. 7

Q25.The phenomenon of light hitting a smooth surface is called?

  1. diffraction of light
  2. scattering of light
  3. refraction of light
  4. reflection of light

Correct Ans: D. Reflection of Light

Q26. On passing through a prism, the rays of sunlight get split into different colors because-

  1. Rays are refracted on two surfaces of the prism
  2. The divergence of rays of different colors is different
  3. Light rays are electromagnetic waves
  4. The rays diverge on the two surfaces of the prism

Correct Ans: B. The divergence of rays of different colors is different

Q27.The phenomenon of polarization in light proves that light is waves?

  1. transverse wave
  2. longitudinal
  3. sharp
  4. progressive

Correct Ans: A. Transverse wave

Q28.The division of different colors of light in a prism is called?

  1. diffraction of light
  2. character dispersion of light
  3. reflection of light
  4. refraction of light

Correct Ans: B. Character dispersion of light

Q29.Who first found the speed of light?

  1. romer
  2. Michaelson
  3. Galileo
  4. Newton

Correct Ans: A. Romer

Q30.The power of a convex lens when it is immersed in water-

  1. increases
  2. keeps unchanged
  3. decreases
  4. none of these

Correct Ans: C. Decreases

Q31.The speed of light is maximum?

  1. vacuum
  2. in hydrogen
  3. diamonds
  4. in the water

Correct Ans: A. Vacuum

Q32. If the power of a lens of which specs is +2 diopters, then its focal length will be-

  1. 50 cm.
  2. 2 cm.
  3. 200 cm.
  4. 100 cm.

Correct Ans: A. 50 cm.

Q33.Speed ​​of light with increase in temperature of medium-

  1. stays the same
  2. falls down
  3. grows
  4. decreases

Correct Ans: A. stays the same

Q34. The focal length of a convex lens is 0.2 m. Its power will be?

  1. -4D
  2. +5D
  3. +2D
  4. -2D

Correct Ans: B. +5D

Q35. The speed of light in water, glass and diamond is in the following order?

  1. Glass>Diamond>Water
  2. diamond>water>glass
  3. diamond>glass>water
  4. Water>Glass>Diamond

Correct Ans: D. Water>Glass>Diamond

Q36. The focal length of a lens is 25 cm. His ability will be-

  1. -2D
  2. -4D
  3. +2D
  4. +4D

Correct Ans: D. +4D

Q37.Approximately how long does light take to travel from the Moon to the Earth?

  1. 1 second
  2. 100 seconds
  3. 8 minutes
  4. 8 seconds

Correct Ans: A. 1 second

Q38.Sunglasses have power?

  1. 2diopters
  2. 4diopters
  3. 0 diopters
  4. 1diopter

Correct Ans: C. 0 diopters

Q39.Approximately how long does it take for sunlight to reach the earth?

  1. 8 minutes
  2. 4 minutes
  3. 6 minutes
  4. 8 seconds

Correct Ans: A. 8 minutes

Q40.Diopter is the unit of what?

  1. Light Intensity
  2. of sound intensity
  3. of lens power
  4. of the focal length of the lens

Correct Ans: C. of lens power

Q41.The velocity of light is-

  1. 3 x 10^8 km/sec
  2. 3 x 10 mile/sec
  3. 3 x 10^8 cm/sec
  4. 3 x 10^8 m/sec

Correct Ans: D. 3 x 10^8 m/sec

Q42.Will an air bubble in water act as it does?

  1. concave mirror
  2. concave lens
  3. convex mirror
  4. convex lens

Correct Ans: B. Concave lens

Q43.Which part of the Sun is visible during a solar eclipse?

  1. Kirit (Corona)
  2. sphere of influence
  3. alphabet
  4. no part

Correct Ans: A. Kirit (Corona)

Q44.The color of light is determined by-

  1. intensely
  2. by speed
  3. dimensions
  4. from wavelength

Correct Ans: D. From wavelength

Q45.The maximum time of total solar eclipse is?

  1. 500 seconds
  2. 600 seconds
  3. 250 seconds
  4. 460 seconds

Correct Ans: D. 460 seconds

Q46.Diverging lens is one which-

  1. imaginary image is formed
  2. makes a real image
  3. spreads rays
  4. collects rays

Correct Ans: C. Spreads rays

Q47.Solar eclipse occurs when-

  1. the sun is in the middle
  2. Sun, Moon and Earth are in one line and Jupiter is not in that line
  3. the moon is in the middle
  4. Earth is in the middle

Correct Ans: C. the Moon is in the middle

Q48. A converging lens is one which-

  1. imaginary image is formed
  2. makes a real image
  3. spreads rays
  4. collects rays

Correct Ans: D. collects rays

Q49. Does lunar eclipse occur?

  1. crescent days
  2. new moon and full moon days
  3. new moon day
  4. full moon days

Correct Ans: D. Full moon days

Q50. If a person stands between two plane mirrors which are inclined at an angle of 600, then how many images will he see?

  1. 5
  2. 6
  3. 3
  4. 4

Correct Ans: A. 5

Q51.When does solar eclipse happen?

  1. any day
  2. Quarter Moon Days
  3. new moon
  4. full moon days

Correct Ans: C. new moon

Q52.What should be the angle between the mirrors when to obtain three images of an object with the help of plane mirrors?

  1. 90°
  2. 45°
  3. 60°

Correct Ans: A. 90°

Q53.Why does a cut diamond sparkle?

  1. due to total internal reflection
  2. Because of some other inherent property
  3. Because of its molecular structure
  4. Causes of Exploitation of Light

Correct Ans: A. Due to total internal reflection

Q54. Two plane mirrors are placed at an angle of 90° and a candle is lit between them. How many images of the candle will be formed in the mirror?

  1. 4
  2. eternal
  3. 2
  4. 3

Correct Ans: D. 3

Q55.Why does a coin lying in a vessel full of water seem to be raised slightly?

  1. due to diffraction of light
  2. due to dispersion of light
  3. due to reflection of light
  4. due to refraction of light

Correct Ans: D. Due to refraction of light

Q56.The number of images formed when an object is placed between two parallel mirrors is?

  1. four
  2. infinite
  3. two
  4. three

Correct Ans: B. infinite

Q57.A person sitting hanging from water see his leg raised and short?

  1. due to diffraction
  2. Reason of Dispersion
  3. causes of refraction
  4. Reflection Cause

Correct Ans: C. Causes of Refraction

Q58. What is the minimum height of a plane mirror to see the complete image of a person?

  1. one quarter of a person’s height
  2. twice the height of the person
  3. Equal to person’s height
  4. half of a person’s height

Correct Ans: D. Half of the person’s height

Q59. When a compact disc is seen in sunlight, the colors similar to Indra’s bow appear?

  1. Based on the phenomenon of diffraction and transit
  2. Refraction based on the phenomenon of diffraction and transit
  3. Based on the phenomenon of reflection and diffraction
  4. Based on the phenomenon of reflection and transit

Correct Ans: C. Based on the phenomenon of reflection and diffraction

Q60. The image formed by the eye of the retina is-

  1. real, straight, short
  2. unreal, Inverted, small
  3. Real, Inverted, Small
  4. real, upright, big

Correct Ans: C. Real, Inverted, Small

Q61.Why does a fish lying under water appear to be raised slightly above its actual depth?

  1. due to polarization of light
  2. due to reflection of light
  3. due to diffraction of light
  4. due to refraction of light

Correct Ans: D. Due to refraction of light

Q62.Where is the image of an object formed in the human eye?

  1. pupil
  2. retina
  3. cornea
  4. Iris

Correct Ans: B. retina

Q63.A stick immersed in water appears to be bent due to what?

  1. refraction of light
  2. scattering of light
  3. reflection of light
  4. diffraction of light

Correct Ans: A. Refraction of Light

Q64.What do you use to shave a beard?

  1. flat mirror
  2. convex mirror
  3. concave mirror
  4. none of these

Correct Ans: C. Concave mirror

Q65. When a ray of light passes from a rarer medium to a denser medium, it will-

  1. bends towards the normal
  2. deflects away from the normal
  3. goes straight
  4. none of these

Correct Ans: A. bends towards the normal

Q66.Which type of mirror is used in the headlights of vehicles?

  1. concave mirror
  2. Parabolic Mirror
  3. flat mirror
  4. convex mirror

Correct Ans: A. Concave mirror

Q67.What causes a rainbow to form?

  1. diffraction and refraction
  2. refraction and reflection
  3. refraction and dispersion
  4. Scattering and Refraction

Correct Ans: B. Refraction and Reflection

Q68.The mirror used by dentists to see the teeth of patients is-

  1. concave
  2. flat
  3. convex
  4. none of these

Correct Ans: A. Concave

Q69.What is the phenomenon known as a mirage?

  1. polarization
  2. absolute internal reflection
  3. adulteration
  4. diffraction

Correct Ans: B. absolute internal reflection

Q70.Vehicles use what to see the objects coming from behind?

  1. convex mirror
  2. concave mirror
  3. convex lens
  4. concave lens

Correct Ans: A. Convex mirror

Q71.The technique used for the exploration of the abdomen or other internal organs of the body is endoscopy based?

  1. on diffraction phenomena
  2. On Polarization
  3. On the full internal enforcement phenomenon
  4. on the phenomenon of interference

Correct Ans: C. On the full internal enforcement phenomenon

Q72.The formation of bright colors in thin soap is the result of which phenomenon?

  1. refraction and dispersion
  2. Polarization and Personification
  3. Forgotten Reflection and Interference
  4. multiple refraction and dispersion

Correct Ans: C. Forgotten Reflection and Interference

Q73. Why does the bottom of a beaker filled with liquid appear raised?

  1. diffraction
  2. reflection
  3. refraction
  4. adulteration

Correct Ans: C. Refraction

Q74.Which one is used to make Periscope?

  1. concave mirror
  2. plane mirror
  3. concave lens
  4. none of these

Correct Ans: B. plane mirror

Q75. Internal reflection of light from the Sun can happen if the light-

  1. go from glass to air
  2. go from water to glass
  3. go from air to glass
  4. go from air to water

Correct Ans: A. go From glass to air

Q76.Why dry sand appears bright while wet sand is bright?

  1. The reason for this is refraction
  2. it’s scatter
  3. It’s an optical illusion
  4. this is due to reflection

Correct Ans: D. this is due to reflection

Q77.Glassed glass appears to be glazed?

  1. causes of interference
  2. absolute internal reflection
  3. causes of refraction
  4. Reflection Cause

Correct Ans: B. absolute Internal Reflection

Q78.Which color of rainbow has more deflection?

  1. red
  2. blue
  3. purple
  4. Pil

Correct Ans: A. red

Q79.On what principle does optical fiber work?

  1. adulteration
  2. absolute internal reflection
  3. refraction
  4. scattering

Correct Ans: B. absolute Internal Reflection

Q80.What causes the atmosphere to become red during sunrise and sunset?

  1. dispersion of light
  2. scattering of light
  3. refraction of light
  4. reflection of light

Correct Ans: B. Scattering of Light