Exam-style question
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What is the effect of increasing the diameter of the objective lens in an astronomical telescope?.
- A.Increases the telescope's weight
- B.Decreases the resolving power
- C.Increases the collecting power
- D.Reduces the field of view
Model answer
What a good answer should say
- Increases the collecting power
Explanation
Why this works
A larger diameter objective lens allows the telescope to collect more light, enhancing its collecting power. This increased light-gathering ability improves the visibility of faint objects in the night sky, making it easier to observe distant stars and galaxies.
Therefore, the diameter of the lens is directly linked to the telescope's observational capabilities.
Common mistake
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