Light

Front

What is refraction?

Back

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

Front

What causes light to bend when it enters water from air?

Back

The bending of light when it enters water from air is caused by a change in speed.

Front

Why does a fork look different when viewed underwater?

Back

A fork looks different underwater because light is refracted at an angle, altering its appearance.

Front

What happens to the appearance of a pencil when placed in water?

Back

The pencil appears broken or displaced due to the refraction of light.

Front

What is the relationship between light color and reflection?

Back

The color of an object is determined by the wavelengths of light it reflects; for example, a yellow shirt reflects yellow light and absorbs other colors.

Front

What is the index of refraction?

Back

The index of refraction is a measure of how much light slows down in a medium compared to its speed in a vacuum.

Front

How does the angle of incidence relate to refraction?

Back

The angle of incidence is the angle between the incoming light ray and the normal line; it affects the angle of refraction according to Snell's Law.

Front

What is Snell's Law?

Back

Snell's Law relates the angles of incidence and refraction to the indices of refraction of the two media: n1 * sin(θ1) = n2 * sin(θ2).

Front

What is total internal reflection?

Back

Total internal reflection occurs when light attempts to move from a denser medium to a less dense medium at an angle greater than the critical angle, causing it to reflect entirely back into the denser medium.

Front

What is the critical angle?

Back

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