Question

If the diameter of a radar dish is doubled, what happens to its resolving power, assuming that all other factors remain unchanged? Its resolving power
a. is reduced to one-half its original value.
b. Quadruples.
c. is reduced to one-quartet its original value.
d. Halves.
e. Doubles.

Answer 1

Answer:

e. Doubles.

Explanation:

Resolving power is given by the formula as follows :

$\dfrac{1}{d\theta}=\dfrac{D}{1.22\lambda}$

Here, $d\theta$ is the angle subtended by two distant objects

D is diameter of the telescope

Here, the diameter of a radar dish is doubled, assuming all other factors remain unchanged, then the resolving power gets doubled. Hence, the correct option is (e).