Mr K Ch 14 Refraction Test

Why does the lawnmower turn when it strikes the grass (when moving from top left toward bottom right)?

• The left wheel speeds up before the right one.

• The right wheel slows down before the left one.

• Both wheels slow down at the same rate.

• The grass pushes the lawnmower to the side.

What is refraction?

• The bending of sound when it travels from one medium into another.

• The reflection of light when it hits a shiny surface.

• The bending of light when it travels from one medium into another.

• The absorption of light by a medium.

What causes refraction?

• Caused by a change in color

• Caused by a change in intensity

• Caused by a change in speed

• Caused by a change in temperature

What happens to wave fronts when they enter glass from air?

• They speed up

• They remain at the same speed

• They slow down

• They disappear

What is the effect on the wavelength of the waves as they enter glass from air?

• The wavelength increases

• The wavelength remains the same

• The wavelength is shortened

• The wavelength becomes infinite

What happens to light rays when they slow down upon entering a different medium?

• They bend away from the normal line.

• They continue in a straight path without bending.

• They bend toward the normal line.

• They immediately reflect back into the original medium.

How are the angles of refraction measured in ray diagrams?

• With the horizontal line.

• With the vertical line.

• With the normal line.

• With the surface of the medium.

What is the index of refraction?

• The ratio of the speed of sound in a vacuum to the speed of sound in a given transparent medium

• The ratio of the speed of light in a vacuum to the speed of light in a given transparent medium

• The ratio of the speed of light in a given transparent medium to the speed of light in a vacuum

• The ratio of the speed of light in air to the speed of light in glass

When measuring angles in Snell's Law, with what must the angles be measured?

• With the horizontal surface

• With the vertical surface

• With the normal

• With the incident ray

What is a lens?

• A mirror that reflects light.

• A transparent object that converges or diverges light by refraction.

• A type of prism that disperses light into a spectrum.

• A solid object that completely blocks light.