Physics in everyday life - Light

How does a mirage occur?

• Absorption of light

• Refraction of light

• Reflection of sound

• Scattering of light

Explain the law of reflection with an example.

• The law of reflection only applies to sound waves, not light waves.

• When a light ray strikes a rough surface, it reflects off at a different angle.

• When a light ray strikes a smooth surface, it reflects off at the same angle it hit the surface.

• The law of reflection states that light rays pass through a surface instead of reflecting off it.

What is the difference between regular and irregular reflection?

• Regular reflection occurs when light rays are reflected uniformly in a single direction, while irregular reflection occurs when light rays are reflected in multiple directions.

• Regular reflection is the reflection of light from a smooth surface, while irregular reflection is the reflection of light from a rough surface.

• Regular reflection happens when light rays are reflected in multiple directions, while irregular reflection occurs in a single direction.

• Regular reflection occurs when light rays are reflected in a zigzag pattern, while irregular reflection occurs in a straight line.

Define refraction and provide an example of it in everyday life.

• When a car moves in a straight line

• When a rock sinks in water

• When a straw appears bent in a glass of water.

• When a mirror reflects light

Explain how the speed of light changes when it enters a different medium.

• The speed of light changes when it enters a different medium due to the change in the medium's color.

• The speed of light changes when it enters a different medium due to the change in the medium's refractive index.

• The speed of light changes when it enters a different medium due to the change in the medium's density.

• The speed of light changes when it enters a different medium due to the change in the medium's temperature.

What is the significance of VIBGYOR in the study of light?

• It represents the temperature of different light sources.

• It represents the colors of the visible spectrum of light.

• It is a code used by astronomers to identify different types of stars.

• It is a measurement scale for the brightness of light.

How does a prism separate white light into its component colors?

• By emitting different colors of light from the prism

• By refracting light at different angles based on its wavelength

• By reflecting light off the surface of the prism

• By absorbing certain colors and reflecting others

Explain the concept of total internal reflection and provide an example of it in real life.

• When a pencil appears bent in a glass of water

• When a coin sinks in water

• When a mirror reflects light

• When a car moves in a straight line

Describe the phenomenon of dispersion of light and its impact on a rainbow formation.

• The dispersion of light causes the formation of a rainbow due to the separation of different colors of light.

• The dispersion of light causes the formation of a rainbow due to the reflection of light from water droplets.

• The dispersion of light causes the formation of a rainbow due to the refraction of light through a prism.

• The dispersion of light causes the formation of a rainbow due to the absorption of light by water droplets.

What causes the phenomenon of a rainbow?

• Reflection of light

• Refraction of light

• Scattering of light

• Absorption of light