Atomic Structure Question 375

Question: The values of Planck’s constant is 6.63×1034 Js. The velocity of light is 3.0×108ms1 . Which value is closest to the wavelength in nanometres of a quantum of light with frequency of 8×1015s1 -

Options:

A) 5×1018

B) 4×101

C) 3×107

D) 2×1025

Show Answer

Answer:

Correct Answer: B

Solution:

  • E=hv=chλ;,and,v=cλ

8×1015=3.0×108λ
λ=3.0×1088×1015=0.37×107

=37.5×109m=4×101nm



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