Quiz 6

The Doppler Effect is best described as: how bats fly and locate their food. a change in wave frequency when neither source nor receiver is moving. how dolphins navigate in the world's oceans. a change in wave frequency when source or receiver is moving. how humans see the colors red and blue.

a change in wave frequency when source or receiver is moving.

Sound waves cannot travel through: water. very dense materials. helium. a vacuum. glass.

a vacuum.

Of the kinds of waves listed below, which one does not result in the transport of matter? sound wave ocean wave seismic wave X-ray subsonic wave

X-ray

Another word for constructive interference is: amplitude. Doppler Effect. acceleration. destructive. reinforcement.

reinforcement.

Which of the following is the same for all kinds of electromagnetic waves? frequency speed energy transmission wavelength

speed

When we hear a sound change from a higher to a lower pitch, this means: the speed has changed. the wavelength has changed. the sound wave has bounced. the frequency has changed. none of the above.

the frequency has changed.

Which sound wave frequency is outside the range of a human's ability to hear? 10000 Hz 5 Hz 2000 Hz 20 Hz 200 Hz

5 Hz

What is the velocity of a wave if the distance between the crests is 16 meters and 40 waves go by every 10 seconds? 16 m/sec 64 m/sec 32 m/sec 4 m/sec 8 m/sec

64 m/sec

Which statement best describes transverse waves? A wave a frog would make jumping up and down on a lily pad. Echoes are formed from transverse waves. The energy moves perpendicular to the wave direction. The transverse wave moves particles in the direction that the wave is moving. Transverse waves are a special type of longitudinal wave.

A wave a frog would make jumping up and down on a lily pad.

Which of the following is strictly a longitudinal wave? Sound waves Water waves Any electromagnetic waves Laser light Light waves

Sound waves

Which of the following would cause an electromagnetic wave to be emitted? trying to separate electrical from magnetic phenomena destructive interference of sound waves acceleration of an electric charge constructive interference of any kind of wave writing an equation that has the wave form in it

acceleration of an electric charge

Gamma radiation is a shorter wavelength than: visible light X-rays all of the above microwaves radio waves

all of the above

What characteristic of waves is measured in Hertz? speed energy amplitude frequency length

frequency

Compared to microwave radiation, infrared radiation: has longer wavelengths. has shorter wavelengths. is a slower wave. is a faster wave. is visible to the human eye.

has shorter wavelengths.

Electromagnetic waves are produced: where there is heat and light. where electromagnetic waves are bent. when electrical charges are accelerated. none of the above. when positive and negative charges meet.

when electrical charges are accelerated.

Human eyes are most sensitive to this color. blue green yellow violet red

yellow

How fast can light travel in one second, if it is moving through a vacuum? 3,000,000 kilometers 18,600 kilometers 186,000 kilometers 30,000 kilometers 300,000 kilometers

300,000 kilometers

All electromagnetic waves travel at: 300,000 km/sec 300 km/hr. 30,000 km/hr 300,000 km/hr 30,000 km/sec

300,000 km/sec

The ability of microwave ovens to cook food depends partly upon the fact that microwaves are: absorbed in dry air and thus heat the whole oven and its contents. absorbed quickly by water molecules, which does nothing to heat food. absorbed quickly by water molecules, which generates heat. reflected by the interior of an oven, which causes heat to be generated in the oven wall. scattered by water molecules, which helps heat the glass door of the oven.

absorbed quickly by water molecules, which generates heat.

What aspect of a sound wave makes it seem loud to people hearing the sound? frequency wavelength wavelength amplitude velocity.

amplitude

Turning up the volume of music or speaking louder means that the sound wave has changed: speed. amplitude. wavelength. none of the above. frequency.

amplitude.

If you are observing a light source moving very rapidly towards you, the Doppler Effect predicts that the light will be: bent. transmitted. blue-shifted. red-shifted. radiated.

blue-shifted.

White materials scatter all wavelengths of visible light in all directions in a process called: absorption. diffusion. transmission. reflection. refraction.

diffusion.

Sound waves with low frequencies: travel at faster speeds than sound waves with high frequency. have low pitches. have high pitches. are more likely to experience destructive interference. have low amplitudes if they are loud.

have low pitches.

Albert Michelson was the first U.S. scientist to win the Nobel Prize. His prize was for: his work with accelerating electrical charges. his studies of light. proving Maxwell's equations again. proving Maxwell's equations again. his research into static electricity.

his studies of light.

Bats navigate by emitting high pitched sound waves and killing all the moths within 10 meters. listening for an echo from obstructions. attracting various insects toward the sound. hoping humans do not hear them. calculating wave crests per second.

listening for an echo from obstructions.

What practical use has been found for gamma rays? cooking food and heating water generating light and heat carrying radio signals detecting the speed of a moving vehicle medical applications

medical applications

Line-of-sight communications and radar rely heavily on what type of electromagnetic wave? radio waves X-rays gamma rays microwaves visible light

microwaves

Which of the following has a frequency of 440 Hz? a television station high C musical note an FM radio station an AM radio station middle A musical note

middle A musical note

Of the types of radiation listed below, the only one that humans can detect is: infrared waves gamma rays X-rays visible light none of the above

none of the above

Which is not associated with broadcast radio waves? none of the above electron motion in an antenna frequency modulation frequency slices or bands amplitude modulation

none of the above

Waves transfer energy from: one place to another. one wavelength to another. one frequency to another. one speed of wave to another. none of the above.

one place to another.

Individual particles in a transverse wave move: parallel to the wave direction. perpendicular to the medium. in large circles. perpendicular to the wave direction. in small circles.

perpendicular to the wave direction.

The higher the frequency of a sound wave: lower the pitch. the longer the wavelength. the faster it travels. louder it is. the shorter the wavelength.

the shorter the wavelength.

The fundamental difference between electromagnetic waves and other types of waves is that electromagnetic waves: all have the same wavelength. are invisible regardless of wavelength. transfer energy without transferring mass. do not experience constructive or destructive interference. move more slowly than all other types of waves.

transfer energy without transferring mass.

Light passing through a window glass is an interaction called: absorption. transmission. reflection. scattering. the greenhouse effect.

transmission.

Human skin can be strongly affected by what type of electromagnetic radiation? gamma rays visible light radio waves ultraviolet radiation X-rays

ultraviolet radiation

Which type of radiation is commonly used to sterilize medical equipment? microwave radiation fluorescence infrared radiation ultraviolet radiation radio waves

ultraviolet radiation

Cats' eyes are more sensitive to__________ than humans'. visible light X-rays gamma rays infrared waves radio waves

visible light