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Q.

The value of Plank’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

25

b

50

c

10

d

75

answer is C.

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Detailed Solution

C=vλ

λ=cv=3×10176×1015=50nm

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