Question

Assertion :The resolving power of both miscroscope and telescope depends on the wavelength of light used. Reason: The resolving power of a lens is the ability to resolve the two images so they are distinctly indentified.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

For telescope resolving power is $P=\frac{d}{1.22\lambda }$

For microscope $P=\frac{2nsin\theta }{\lambda }$

When a point object is imaged using a circular opening (or aperture) like a lens or the iris of our eye, the image formed is not a point but a diffraction pattern. This is true particularly when the size of the object is comparable to the wavelength of light.

It is defined as the inverse of the distance or angular separation between two objects which can be just resolved when viewed through the optical instrument.

Both are correct but the statement 2 is not the correct explanation of first statement.