Whats the reason for change in light intensity as you switch from low to high power in a microscope?

Whats the reason for change in light intensity as you switch from low to high power in a microscope?
Whats the reason for change in light intensity as you switch from low to high power in a microscope?
At high power, you are looking at a smaller field-of-view. So that means you are gathering less light.

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