Question Detail

PHY 104 MICROSCOPE Objective Question

Question

Based on the resolving power formula RP = 1.22λ / D, if the diameter of the telescope's objective (D) increases, what happens to the numerical value of the resolving power (RP)?
Options
A It increases.
B It decreases.
Correct Answer
C It remains unchanged.
D It first increases then decreases.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The formula RP = 1.22λ / D shows that RP is inversely proportional to D. If D (the diameter) increases, the denominator gets larger, causing the overall value of RP to decrease. A smaller numerical value of RP indicates a better ability to distinguish closely spaced objects (i.e., improved resolution).

Hint

Consider the relationship between D and RP in the formula (inverse or direct proportionality).

Question Info