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Wave Optics

Question

Assertion: In a common emitter transistor amplifier, the input current is much less than the output current than output impedance.
Reason: The common emitter transistor amplifier has higher input impedance than output impedance.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

Solution

If both assertion and reason are true and reason is the correct explanation of assertion.

Resolving power of telescope

R = $\frac{1}{∆ θ}$

R = $\frac{a}{1.22 λ}$

Here a is the diameter of the objective of the telescope.