Exam 6: Waves and Sound

How many times greater is the speed of red light (λ = 700 nm)than the speed of violet light (λ = 400 nm)in a vacuum?

A Doppler red shift indicates

A radar pulse returns 9.0 × 10^-4 s after it was sent out and reflected by an object.What is the separation distance of the radar source and the object?

Of the two main types of waves,light is a(n)______________ wave.

A disturbance in particle motion perpendicular to the wave velocity is called a

Resonance occurs when

A sound with a frequency of 15 Hz is in the ______________ region of the sound spectrum.

Light in a vacuum has a speed of ______________ m/s.

Sound is a(n)

If a sound level increases by 30 dB,the intensity increases by a factor of ______________.

If the wave frequency is doubled,the period of the wave is ______________.

The intensity of a 80-dB whistle is quadrupled.What is the new decibel level?

For a wave with a constant speed,the smaller the period,the ______________ its wavelength.

What is the wavelength in meters,of a sound wave (v = 340 m/s)with a frequency of 4 Hz?

What is the wavelength,in meters,of radio waves produced by a radio station with a frequency of 1400 kHz? (c = 3.00 × 10⁸ m/s)

A series of ocean waves,each 6.0 m from crest to crest and moving past an observer at a rate of 2.0 waves per second,has what speed? ​

Which of the following sound frequencies lie(s)in the audible range?

As a truck moves away from a person with its horn blowing,the person hears a frequency ______________ than that of the horn.

Wave velocity is inversely proportional to

A Doppler red shift indicates