Q.

The wave length of neon sign is 600 nm. What is the distance travelled by the radiation in

 20 s?

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a

16 x 1010 m

b

1.6 x 109 m

c

6 x 108 m

d

6 x 109 m

answer is A.

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Detailed Solution

Distance travelled by radiation = velocity x time

= 3 x 108 m x 20 = 6 x 109 m

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