A particular reflecting telescope has an objective mirror with a focal length of 1.2 m and an eyepiece of focal length 6mm. Hence the magnifying power of this telescope would be 2 meter.
The magnifying power of the telescope is the ratio of the focal length of the object to the focal length of the eyepiece, that is, m = [tex]\frac{fo}{fe}[/tex]
Given, the focal length of a objective mirror = 1.2 m,
First, we will convert it to centimeters for ease,
∴ Now, the focal length of objective mirror is 120 centimeters, and,
the focal length of an eyepiece is 6mm which is also 0.6 centimeters.
For a telescope, the magnification is given as:
∵ m = [tex]\frac{fo}{fe}[/tex]
⇒ m = [tex]\frac{120}{0.6}[/tex]
⇒ m = 200 centimeters or 2 meter.
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