MHT CET · Physics · Ray Optics
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 léns.
- C decrease the focal length of the eyepiece.
- D decrease the diameter of the objective lens.
Answer & Solution
Correct Answer
(B) increase the refractive index of the medium between the object and objective léns.
Step-by-step Solution
Detailed explanation
Resolving Power \(\mathrm{R}=\frac{\text { N.A }}{0.61 \lambda}\)
\(\text { N.A }=2 \mathrm{n} \sin \alpha\)
\(\therefore \quad\) By increasing the refractive index of the medium between the subject and the objective lens, the resolving power can be increased.
\(\text { N.A }=2 \mathrm{n} \sin \alpha\)
\(\therefore \quad\) By increasing the refractive index of the medium between the subject and the objective lens, the resolving power can be increased.
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