When the telescope eyepiece is changed from 20-mm to 50-mm(Select All the answers that are correct)Group of answer choicesthe magnification is decreasedthe magnification is increasedthe field of view is decreasedthe field of view is increasedthe brightness of the object is decreasedthe brightness of the object is increased
Question
When the telescope eyepiece is changed from 20-mm to 50-mm(Select All the answers that are correct)Group of answer choicesthe magnification is decreasedthe magnification is increasedthe field of view is decreasedthe field of view is increasedthe brightness of the object is decreasedthe brightness of the object is increased
Solution
The correct answers are:
- The magnification is decreased
- The field of view is increased
- The brightness of the object is increased
Explanation:
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The magnification of a telescope is calculated by dividing the focal length of the telescope by the focal length of the eyepiece. So, if you increase the focal length of the eyepiece (from 20mm to 50mm), the magnification will decrease.
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The field of view is generally inversely proportional to the magnification. This means that when the magnification decreases (as it does when you change the eyepiece from 20mm to 50mm), the field of view increases.
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The brightness of the object is also inversely proportional to the square of the magnification. So, when the magnification decreases, the brightness of the object increases.
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