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Q.

The value of Planck's constant is 6.63×10−34Js. The speed of light is 3×1017nms−1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6×1015s−1?

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a

10

b

25

c

50

d

75

answer is C.

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Detailed Solution

Formula used:

c=vλ;  λ=cv

Substitute the given values in the above expression:

λ=3×10176×1015=50 nm

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