Test #2 Clicker Questions

The wavelength of the wave shown in the figure is. . .

• A

• B

• C

• D

The amplitude of the wave shown in the figure is

• A

• B

• C

• D

The higher the frequency of a sound wave,

• the higher its speed

• the higher its pitch

• the louder it is

• the longer the wavelenght

A wave will spread out after it passes through a small opening. This phenomenon is called . . .

• reflection

• diffraction

• refraction

• interference

As a longitudinal wave (compression wave) travels through a certain material, the wave disturbance will cause particles in the material to . . .

• vibrate at right angles (perpendicular) to the direction that the wave is moving

• vibrate along the same direction (parallel) to the direction that the wave is moving

• You can't fool me, the particles in the material travel with the wave and do not vibrate

• HUH?!

The speed of a wave can be calculated if the . . .

• amplitude is known

• frequency and amplitude are known

• wavelength and frequency are known

• period and frequency are known

If the sound of a moving object is shifted towards higher frequency, what can you conclude about the object . . .

• It is moving toward you

• It is moving away from you

• It is far away

• It is very close

If the frequency of a light wave (photon) is increased, the energy is . . .

• increased

• decreased

• You can't fool me, the energy is not changed when you change the frequency

• Yeah, I don't know

The most common element in the Universe is ______.

• Hydrogen

• Helium

• Oxygen

• Nitrogen

The atomic number is the number of ______ in an atom.

• Protons

• Neutrons

• Electrons

• Protons and Neutrons