21.
Light takes 8 min 20 sec to reach from sun on the earth. If the whole atmosphere is filled with water, the light will
take the time (k = 4/3)
Answers
Answered by
1
Answer:
11 min 5 s
Explanation:
k = 4/3 = 1.33
When k = 1, t = 500 seconds = 8 min 20 seconds
When k = 1.33, t = 500*1.33 = 665 s = 11 min 5 s
Answered by
1
Answer:
11 min 6 sec
Explanation:
we know that
Refractive index = Vc/Vm ....... (1)
where, Vc = velocity of light in vacuum
Vm = velocity of light in medium
so,
Vm = Vc/ Refractive index ..... from (1)
Vm = Vc / 4/3
Vm = 3/4Vc (reciprocal) ..... (2)
Vm × t1 = Vc × t
t1 = Vc/Vm × t
t1 = Vc/3/4Vc × t ..... From (2)
t1 = 4/3 × t ..... (3)
in the question they gave t = 8 min 20 sec , which is equal to 500 seconds
so , t1 = 4/3 (500)
that will be equal to 666.6 sec, which is equal to 11 min 6 sec
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