Question

In: Physics

An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at...

An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at opposite ends of a 45.0 cm long tube. If the eyepiece has a focal length of 1.70 cm, calculate the required focal length in cm of the objective lens and the angular magnification of the telescope.

HINT

(a)

the required focal length in cm of the objective lens

(b)

the angular magnification of the telescope

Solutions

Expert Solution

Solution::

L= 45.0 cm =eyepiece at opposite ends long tube

fe = the eyepiece has a focal length =1.70 cm

Let:s f0 = the required focal length of object

The given length of the long tube and the focal length of eyepiece using this formula

..........................(1)

a) The required focal length in cm of the objective lens is =

The angular magnification of the telescope is M,

..........................(2)

where

fe = 1.70 cm

from equation (2)

[There the negative sign indicates inverted image.]

the angular magnification of the telescope is = 25.47

ANSWER""". a) 43,3 cm

b) 25.47 cm

genius_generous answered 1 year ago

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