Question

When wavelength of light used in optic I instruments A and Bare 4500 Å and 6000 Å respectively, the ratio of resolving pow of A to B will be ______.

Options

• 9 : 16

• 16 : 9

• 7 : 1

• 4 : 3

Answer 1

When wavelength of light used in optic I instruments A and Bare 4500 Å and 6000 Å respectively, the ratio of resolving pow of A to B will be 4 : 3.

Explanation:

Resolving power `prop 1/lambda`

Here, λ_A = 4500 Å and λ_B = 4500 Å

`("Resolving power")_"A"/("Resolving power")_"B" = lambda_"B"/lambda_"A"`

`= 6000/4500 = 4/3` or 4 : 3