Lesson 3 Lenses & Reflection

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another.

Front

What does the index of refraction measure?

Back

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

Front

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

Back

Light slows down when it passes from air to water.

Front

Which medium does light pass through the slowest: Water, Air, or Glass?

Back

Light passes through Glass the slowest.

Front

What is a convex lens?

Back

A convex lens is thicker in the center and converges light rays.

Front

What is a concave lens?

Back

A concave lens is thinner in the center and diverges light rays.

Front

What is reflection?

Back

Reflection is the bouncing back of light when it hits a surface.

Front

What is the law of reflection?

Back

The law of reflection states that the angle of incidence equals the angle of reflection.

Front

What is total internal reflection?

Back

Total internal reflection occurs when light hits a boundary at an angle greater than the critical angle, causing it to reflect entirely 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.