The most commonly used formula in amateur astronomy is used to calculate the magnification of a telescope: magnification = focal length of telescope / focal length of eyepiece. Example: using a 10mm eyepiece in a telescope with a focal length of 1000mm results in a magnification of 100x (1000 / 10 = 100)
41) The objective of a telescope has a focal length of 1.2 m. It is used to view a 10.0 m tall tower 2 km away. What is the height of the image of the tower formed by the objective?
Answer is:
6 mm
Explanation:
Related Optics MCQ with Answers
Answer is:
17.5 cm
Explanation:
The most commonly used formula in amateur astronomy is used to calculate the magnification of a telescope: magnification = focal length of telescope / focal length of eyepiece. Example: using a 10mm eyepiece in a telescope with a focal length of 1000mm results in a magnification of 100x (1000 / 10 = 100)
Answer is:
both objective and eye-piece have short focal lengths
Explanation:
Magnifying power of a compound microscope is high if both objective and eye-piece have short focal lengths
Answer is:
the objective has a long focal length and the eye-piece has a short focal length
Explanation:
The magnifying power of telescope is high if the objective has a long focal length and the eye-piece has a short focal length
Answer is:
a converging lens of focal length 100 cm
Explanation:
A lens of power + 2.0 D is placed in contact with another lens of power ? 1.0 D. The combination will behave like a converging lens of focal length 100 cm