Grade 8 Physics Quiz: Light

What is the law of reflection?

• The angle of reflection is perpendicular to the angle of incidence

• The angle of reflection is less than the angle of incidence

• The angle of incidence is greater than the angle of reflection

• The angle of incidence is equal to the angle of reflection

Explain the difference between regular and diffuse reflection.

• Regular reflection occurs when light rays are reflected in a random manner, while diffuse reflection occurs when light rays are reflected in a parallel manner.

• Regular reflection occurs when light rays are reflected in a different directions, while diffuse reflection occurs when light rays are reflected in a parallel manner.

• Regular reflection occurs when light rays are reflected in a parallel manner, while diffuse reflection occurs when light rays are reflected in different directions.

• Regular reflection occurs when light rays are absorbed, while diffuse reflection occurs when light rays are refracted.

What is refraction of light?

• The bending of light as it passes from one medium to another.

• The reflection of light off a surface

• The emission of light from a source

• The absorption of light by a medium

How does the speed of light change when it enters a different medium?

• It becomes faster

• It stays the same

• It becomes slower

• It changes

What is dispersion of light?

• Absorption of light by an object

• Separation of light into its different colors

• Reflection of light off a surface

• Combining of light into a single color

Describe how a prism separates white light into its component colors.

• The prism separates white light into its component colors by diffracting the light.

• The prism separates white light into its component colors by refracting and dispersing the light.

• The prism separates white light into its component colors by absorbing the light.

• The prism separates white light into its component colors by reflecting the light.

What is the visible spectrum of light?

• Black and white colors only

• Infrared and ultraviolet light

• Range of colors that can be heard by the human ear

• Range of colors that can be seen by the human eye

Explain why different objects appear to have different colors under different lighting conditions.

• Different objects reflect and absorb different wavelengths of light, resulting in the perception of different colors.

• Different objects absorb all wavelengths of light under different lighting conditions

• Different objects emit their own light under different lighting conditions

• Different objects change their actual color under different lighting conditions

How does light interact with different colored objects?

• Creating a new color

• Absorbing certain wavelengths and reflecting others

• Changing the color of the light

• Bouncing off the surface

What is the relationship between the color of an object and the light it reflects or transmits?

• The color of an object is determined by the wavelengths of light it reflects or transmits.

• The color of an object is determined by the speed of the light it reflects or transmits.

• The color of an object is determined by the material it is made of, not by the light it reflects or transmits.

• The color of an object is determined by the temperature of the light it reflects or transmits.