Question 324: Ray Optics

Question

If the focal length of objective lens is increased then magnifying power of

Accepted Answer

Magnifying power of microscope
m = $$\left( {{L \over {{f_0}}}} \right)\left( {{D \over {{f_e}}}} \right)$$
So if f
o
increases, then m will decrease.
Magnifying power of telescope, m = $$\left( {{{{f_0}} \over {{f_e}}}} \right)$$
So if f
o
increases, then m will increase.

Answer

microscope will increase but that of telescope decrease.

Answer

microscope and telescope both will increase.

Answer

microscope and telescope both will decrease.

Answer

microscope will decrease but that of telescope will increase.

Ray Optics

If the focal length of objective lens is increased then magnifying power of

Choose the correct answer: