Lesson 3 Lenses & Reflection

Front

What is Refraction?

Back

Refraction is the bending of light as it passes from one medium to another, caused by a change in its speed.

Front

What happens to light when it passes through water?

Back

Light slows down and bends, which can cause objects to appear distorted or broken.

Front

What is a Concave lens?

Back

A concave lens is thinner in the center than at the edges and diverges light rays that pass through it.

Front

What is a Convex lens?

Back

A convex lens is thicker in the center than at the edges and converges light rays that pass through it.

Front

Which medium does light travel fastest in?

Back

Light travels fastest in air.

Front

What is the Index of Refraction?

Back

The index of refraction is a measure of how much light rays bend when they enter a medium.

Front

What is Reflection?

Back

Reflection is the bouncing back of light rays when they hit a surface.

Front

What is the difference between Refraction and Reflection?

Back

Refraction involves bending of light as it passes through different media, while reflection involves light bouncing off a surface.

Front

What is the effect of a Convex lens on light rays?

Back

A convex lens converges light rays to a focal point.

Front

What is the effect of a Concave lens on light rays?

Back

A concave lens diverges light rays, causing them to spread out.