Understanding Light

The video tutorial explains the behavior of light, including its travel in straight lines, reflection, absorption, and refraction. It demonstrates how light reflects off smooth surfaces like mirrors, how absorption affects color, and how refraction occurs when light passes through different mediums. The tutorial also covers magnification using lenses and mirrors, highlighting the differences between reflection and refraction.

What evidence supports the idea that light travels in straight lines?

• Light can bend around corners.

• Light changes color when passing through a hole.

• Light passes through a hole in a straight line.

• Light creates multiple dots on a surface.

Why do images form on mirrors but not on rough surfaces?

• Rough surfaces absorb all light.

• Mirrors scatter light in all directions.

• Rough surfaces reflect light in the same direction.

• Mirrors reflect light in a predictable way.

How does the color of an object affect its visibility in low light?

• Black objects emit light.

• White objects reflect more light.

• Black objects reflect more light.

• White objects absorb more light.

What happens to light when it is absorbed by an object?

• It passes through the object.

• It changes direction.

• It is emitted as heat.

• It is reflected back.

What happens to light when it travels from air into water?

• It bends.

• It changes color.

• It reflects back.

• It speeds up.

What is the role of a prism in the refraction of light?

• It reflects light.

• It absorbs light.

• It scatters light in all directions.

• It bends light to form a rainbow.

Why do different colors bend different amounts when passing through a prism?

• Because they have different temperatures.

• Because they have different speeds.

• Because they have different wavelengths.

• Because they have different masses.

How do lenses magnify objects?

• By reflecting light.

• By absorbing light.

• By emitting light.

• By refracting light.

What is the main difference between how lenses and mirrors magnify objects?

• Lenses use reflection, mirrors use refraction.

• Both use emission.

• Both use absorption.

• Lenses use refraction, mirrors use reflection.

What is the effect of a curved mirror on the reflection of light?

• It absorbs light.

• It refracts light.

• It magnifies the image.

• It scatters light.