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Light & colour

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Last updated 7 months ago
21 questions
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Question 21
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  • White light is made up of _______ colours, which together form the visible spectrum.
  • The process of splitting white light into its component colours using a prism is called _______
  • _______ has the longest wavelength in the visible spectrum, while _______ has the shortest.
  • When light enters a denser medium, such as glass, it bends. This bending of light is called _______
  • A green object appears green because it _______ green light and _______ all other colours.
  • A black object appears black because it _______ all the colours of light and reflects none.
  • When white light passes through a prism, _______ light bends the most, while_______ light bends the least.
  • If a red object is placed under green light, it will appear _______ because it cannot reflect the green light.
  • The part of the eye responsible for detecting colour is the_______ which contains cone cells.
How does light travel in a vacuum?
In curved paths
In straight lines
In zigzag patterns
It doesn’t travel in a vacuum
What type of wave is light?
Longitudinal
Transverse
Mechanical
Stationary
Which of the following is true about light?
It requires a medium to travel.
It travels slower than sound.
It can travel through a vacuum.
It is a mechanical wave.
What happens when light reflects off a smooth surface?
It scatters in all directions.
It travels through the surface.
It bounces off in one direction.
It stops traveling.
What is the angle of incidence equal to during reflection?
The angle of diffraction
The angle of refraction
The angle of reflection
The angle of absorption
Which surface would produce a clear reflection?
A rough wall
A polished mirror
A piece of paper
A carpet
What happens to light as it enters a denser medium at an angle?
a) It bends away from the normal
b) It bends towards the normal
c) It speeds up
d) It reflects back
Which phenomenon causes a straw in water to appear bent?
a) Reflection
b) Refraction
c) Dispersion
d) Diffraction
What happens to the speed of light as it moves from air to water?
a) It increases
b) It decreases
c) It remains the same
d) It stops
White light is made up of how many colours?
a) Five
b) Seven
c) Eight
d) Nine
What is the process of splitting white light into its component colours called?
a) Reflection
b) Refraction
c) Dispersion
d) Absorption
Which colour has the longest wavelength in the visible spectrum?
a) Red
b) Violet
c) Green
d) Blue
Which colour of light bends the most when refracted?
a) Red
b) Yellow
c) Blue
d) Violet
What happens to white light when it hits a green object?
a) All colours are absorbed.
b) All colours are reflected.
c) Only green is absorbed.
d) Only green is reflected.
Why does a black object appear black?
a) It absorbs all light.
b) It reflects all light.
c) It transmits all light.
d) It refracts all light.
What determines the colour an object appears?
a) The light it absorbs
b) The light it reflects
c) The light it refracts
d) The light it emits
What happens when we see a red apple under white light?
a) Red light is absorbed.
b) Red light is reflected.
c) All light is absorbed.
d) All light is reflected.
What colour would a red apple appear under blue light?
a) Red
b) Black
c) Blue
d) White
What happens to the other colours in white light when we see a blue object?
a) They are refracted.
b) They are absorbed.
c) They are reflected.
d) They are dispersed.
Which part of the eye helps us see different colors?
a) Pupil
b) Retina
c) Cornea
d) Iris