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WorksheetsGrade 8 Physics Light Quiz
Total questions: 16
Worksheet time: 8mins
What is the law of reflection?
The angle of incidence is equal to the angle of reflection.
The angle of incidence is greater than the angle of reflection.
The angle of reflection is perpendicular to the angle of incidence.
The angle of reflection is less than the angle of incidence.
Explain how a mirror reflects light.
The mirror absorbs the light and then emits it back out
The mirror creates its own light to reflect
The mirror changes the direction of the light by bending it
The smooth surface of a mirror reflects light by following the law of reflection.
Name two examples of opaque materials.
Paper, cardboard
Wood, metal
Air, water
Glass, plastic
Why can't we see through opaque materials?
Because their dense and tightly packed molecular structure absorbs or reflects light instead of allowing it to pass through.
Because they are too bright to see through
Because they are too heavy to see through
Because they are made of transparent materials
Give two examples of translucent materials.
Aluminum foil, cardboard
Wood, plastic
Steel, concrete
Frosted glass, wax paper
What happens when light passes through a translucent material?
It changes the color of the light and becomes a different color.
It reflects all the light and becomes very bright.
It absorbs all the light and becomes completely dark.
It scatters in different directions and some of it is transmitted through the material.
Provide two examples of transparent materials.
Brick, paper
Glass, water
Plastic, concrete
Wood, metal
How do transparent materials allow light to pass through them?
Their atoms are arranged in a way that allows light to travel through without being absorbed or scattered.
They absorb all the light that passes through them
Their atoms are arranged in a way that reflects light in all directions
They generate their own light to pass through them
What is the relationship between light and energy?
Light is a form of energy
Light is a type of sound
Light has no relationship with energy
Light is a form of matter
Explain how light can be converted into other forms of energy.
By converting light into sound waves
Through processes such as photovoltaic effect in solar panels, photochemical reactions, and the generation of heat in objects that absorb light.
Through the process of condensation
By transforming light into magnetic energy
What is the difference between transparent, translucent, and opaque materials in terms of light transmission?
Transparent materials allow all light to pass through, translucent materials allow some light to pass through, and opaque materials do not allow any light to pass through.
Transparent materials do not allow any light to pass through, translucent materials allow all light to pass through, and opaque materials allow some light to pass through.
Transparent materials allow some light to pass through, translucent materials do not allow any light to pass through, and opaque materials allow all light to pass through.
Transparent materials allow some light to pass through, translucent materials allow all light to pass through, and opaque materials do not allow any light to pass through.
What is refraction of light?
Refraction is the bending of light as it passes from one medium to another.
Refraction is the reflection of light as it hits a surface.
Refraction is the absorption of light by a material.
Refraction is the emission of light by a source.
Give two examples of materials that refract light.
Wood, metal
Glass, water
Paper, cardboard
Brick, concrete
What is the phenomenon of light bouncing back from a surface called?
Refraction
Transmission
Reflection
Absorption
What happens when light hits an opaque object?
The light passes through the object
The light is absorbed and then re-emitted
The light is reflected or absorbed, but does not pass through
The light is refracted and changes direction
What is the effect of light passing through a prism?
The light is absorbed by the prism
The light is reflected off the prism
The light is refracted, or bent, resulting in the dispersion of light into a spectrum of colors
The light passes through without any change
