Question

The ratio of resolving power of telescope, when lights of wavelengths 4000 Å and 5000 Å are used, is ..........,choose the correct option from the given options.
(A) 16:25
(B) 5:4
(C) 4:5
(D) 9:1

Answer 1

(D) 9:1 is the real answer.

R.P. ∝1λ⇒(R.P.)1(R.P.)2=λ2λ1=54 Point of object is imaged using the circular opening like the lens or iris of eye.

Image formed are not the point but diffraction pattern.

It is the true particularly have size of the object comparable to wavelength of light.

Circular aperture produces the diffraction pattern with concentric rings.

Answer 2

Holla ^_^

☸ Required Answer is D) 9:1


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