Waves that move through materials are called
A) progressive waves
B) EM waves
C) radio waves
D) UV waves
Correct Answer:
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Q13: Calipers are used to measure the
A)diameter
B)length
C)thickness
D)volume
Q14: Smallest division on stopwatch is
A)0.1 s
B)0.05 s
C)0.01
Q15: intensity of sun's radiation is about {{}}
A)1.0
Q16: When light enters from vacuum in to
Q17: As wave travels, intensity
A)increases
B)remains same
C)decreases
D)varies
Q19: Speed of sound in air is {{}}
A)280
Q20: Particles vibrate about their mean positions and
Q21: Speed of electromagnetic radiation is independent of
A)wavelength
B)amplitude
C)time
Q22: Mechanical waves include
A)sound
B)light
C)EM waves
D)UV waves
Q23: A complete cycle of wave is around
A)90°
B)180°
C)45°
D)360°
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