Home Courses Contact About

1. ⇒ (MHT CET 2023 10th May Morning Shift )

A person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power he should

A. increase the wavelength of light.

B. increase the refractive index of the medium between the object and objective lens.

C. decrease the focal length of the eyepiece.

D. decrease the diameter of the objective lens.

Correct Option is (B)

Resolving Power $R = \frac{N.A}{0.61 λ}$

N.A $= 2 n \sin α$

$∴$ By increasing the refractive index of the medium between the subject and the objective lens, the resolving power can be increased.

2. ⇒ (MHT CET 2023 9th May Morning Shift )

The rays of different colours fail to converge at a point after passing through a thick converging lens. This defect is called

A. spherical aberration

B. distortion

C. coma

D. chromatic aberration

Correct Option is (D)

Currently no explanation available

⇒Wave Optics