Reflection and Refraction

Front

What is the line at 90 degrees to the refracting or reflecting surface called?

Back

Normal

Front

What happens when light bounces off a mirror?

Back

It is reflected.

Front

How does light behave as it enters a denser medium?

Back

It bends toward the normal.

Front

What does the law of reflection state about the angle of incidence and the angle of reflection?

Back

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

Front

What is the angle of reflection if the angle of incidence is 45 degrees?

Back

45 degrees.

Front

What is refraction?

Back

The bending of light as it passes from one medium to another.

Front

What is reflection?

Back

The bouncing back of light when it hits a surface.

Front

What is the critical angle in optics?

Back

The angle of incidence above which total internal reflection occurs.

Front

What is the difference between regular and diffuse reflection?

Back

Regular reflection occurs on smooth surfaces, while diffuse reflection occurs on rough surfaces.

Front

What is the index of refraction?

Back

A measure of how much light slows down in a medium compared to its speed in a vacuum.