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Wave Optics

  1. The ratio of resolving powers of an optical microscope for two wavelengths λ 1 = 4000 Å and λ 2 = 6000 Å is
    1. 9 : 4
    2. 3 : 2
    3. 16 : 81
    4. 8 : 27
Correct Option: B

Resolving power of a microscope

=
2μ sinθ
λ

ie., R ∝
1
λ

or,
R1
=
λ2
R2λ1

Given that the two wavelengths,
​λ1 = 4000 Å
​λ2 = 6000 Å
R1
=
6000 Å
=
3
R24000 Å2



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