Reflection, Refraction & Diffraction

Front

What is reflection in terms of light?

Back

Reflection is the bouncing back of light when it hits a surface, such as a mirror.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another, causing it to change speed and direction.

Front

What is diffraction?

Back

Diffraction is the bending and spreading of waves around obstacles or through openings.

Front

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

Back

Light bends and changes speed, making objects appear distorted or broken.

Front

What is a medium in the context of waves?

Back

A medium is a substance through which waves travel, such as air, water, or glass.

Front

How do electromagnetic waves differ from mechanical waves?

Back

Electromagnetic waves can travel through a vacuum, while mechanical waves require a medium.

Front

What is the law of reflection?

Back

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

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second.

Front

What is total internal reflection?

Back

Total internal reflection occurs when light hits a boundary at a steep angle and reflects completely back into the medium.

Front

What is the critical angle?

Back

The critical angle is the angle of incidence above which total internal reflection occurs.