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NeX [460]
3 years ago
12

If light waves are coherent, a. they shift over time. b. their intensity is less than that of incoherent light. c. they remain i

n phase. d. they have less than three different wavelengths.
Physics
1 answer:
pychu [463]3 years ago
5 0
The correct option is: (c) They  remain in Phase

Two waves <span>are </span>coherent if the following three conditions are met:
1) They<span> have </span><span>the same frequency.
2) They have the same waveform. 
3) They remain in phase.

Hence the correct option is C.</span>
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B

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cultural

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What is the intensity of a traveling plane electromagnetic wave?
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A small first-aid kit is dropped by a rock climber who is descending steadily at 1.3 m/s. After 2.5 s, what is the velocity of t
Artyom0805 [142]

Answer:

D = 30.625 m

Explanation:

given,

Speed of the climber = 1.3 m/s

time = 2.5 s

acceleration due to gravity = 9.8 m/s²

initial speed of the kit = 1.3 m/s

velocity of the kit after 2.5 s

using equation of motion

v = u + a t

v = 1.3 + 9.8 x 2.5

v = 25.8 m/s

distance travel by the kit in 2.5 s

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19.6 h = 663.95

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The kit is 30.625 m below climber.

8 0
3 years ago
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