Waves practice test

If a window is slightly open, sound will still pass from one room to another. What is the leading scientific reason for this?

• Reflection

• Refraction

• Diffraction

• Absorption

Why does it take a while to hear thunder after a lightning bolt?

• Light travels faster than sound can travel through air.

• Sound needs a medium to travel through.

• Light reflects off surfaces better than sound.

• Sound is not processed by the brain as fast as light.

What is it called where the light rays cross after going through a converging lens?

• The index of refraction

• The optical center

• The focal point

• The critical angle

Which of the following is associated with the frequency of a sound wave?

• Pitch

• Pressure

• Loudness

• Timbre

A wave is measured and found to have a frequency of about 10¹³ Hz. What kind of wave is this?

• Gamma-ray

• Visible light

• Infrared light

• Ultraviolet light

Which of the following electromagnetic waves are not visible to the human eye?

• Red light

• Yellow light

• Blue light

• Ultraviolet light

What type of optical device is pictured here?

• Concave Mirror

• Concave Lens

• Convex Mirror

• Convex Lens

Why do lenses bend the light rays that go through them?

• Reflection

• Refraction

• Diffraction

• Absorption

Which of the following statements about sound waves are true?

• Sound waves travel faster in outer space than in air.

• Sound waves are slower than light waves.

• The speed of sound in air is about 343 meters per second.

• Sound waves travel faster in solids than in air.

If an object is placed 30 cm from a magnifying lens, the image appears to be 10 cm away and inverted. What is the magnification of the object?

• -5

• -0.3

• 0.3

• 5