Question 470100: Of the following, the highest index of refraction is found in
air.
diamond.
glass.
water.
Which of the following equations is incorrect?
f = v/λ
v = fλ
v = f/λ
T = 1/f
A spacecraft is leaving the earth. Relative to the radio signals it sends out, the signals received on the earth have
a higher frequency.
a shorter period.
a lower speed.
a longer wavelength.
Thin films of oil and soapy water owe their brilliant colors to a combination of...
reflection, diffraction, and interference.
reflection, refraction, and interference.
refraction, diffraction, and interference.
reflection, refraction, diffraction, and interference.
Light of which of the following colors has the shortest wavelength?
yellow
red
green
blue
Waves in a lake are observed to be 5 m in length and to pass an anchored boat 1.25 s apart. The speed of the waves is…
0.25 m/s.
impossible to find from the information given.
6.25 m/s.
4 m/s.
The musical note A has a frequency of 440 Hz and its wavelength in seawater is 3.5 m. The speed of sound in seawater is
80 m/s.
1540 m/s.
126 m/s.
343 m/s.
Two people talking to one another produce a 50-dB sound. How many people talking would be needed to produce a 60-dB sound, assuming all the people talked in identical fashion?
12
3
10
20
One kHz (kilohertz) is equal to 103 Hz. What is the wavelength of the electromagnetic waves sent out by a radio station whose frequency is 660 kHz? The speed of light is 3 x 108 m/s.
2.2 x 10-3 m.
4.55 x 102 m.
4.60 x 103 m.
1.98 x 1014 m.
A medal in a plastic cube appears to be 12 mm below the top of the cube. If n=1.5 for the plastic, the depth of the medal is actually
18 mm.
6 mm.
24 mm.
8 mm.
Answer by Alan3354(69443)   (Show Source):
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