In a terrestrial telescope,the focal length o | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) For a terrestrial telescope,the magnification $m$ is given by the product of the magnification of the objective-inverting lens system and the eyep

Vedclass · Accepted Answer

$18$

Vedclass · Answer

(C) For a terrestrial telescope,the magnification $m$ is given by the product of the magnification of the objective-inverting lens system and the eyepiece.Given: Focal length of objective $f_o = 90\, cm$,focal length of inverting lens $f_i = 5\, cm$,and focal length of eye lens $f_e = 6\, cm$.The final image is formed at a distance $D = 30\, cm$ from the eyepiece.The magnification of a terrestrial telescope is given by the formula $m = \frac{f_o}{f_e} \left( 1 + \frac{f_e}{D} ight)$.Substituting the given values:$m = \frac{90}{6} \left( 1 + \frac{6}{30} ight)$$m = 15 \left( 1 + 0.2 ight)$$m = 15 	imes 1.2 = 18$.Thus,the magnification is $18$.

In a terrestrial telescope,the focal length of the objective is $90\, cm$,the inverting lens is $5\, cm$,and the eye lens is $6\, cm$. If the final image is formed at $30\, cm$ from the eye lens,calculate the magnification.

Similar Questions

The focal length of the objective and the eyepiece of a telescope are $100\, cm$ and $5\, cm$ respectively. If the final image is formed at the least distance of distinct vision,the magnification of the telescope is:

$A$ planet is observed by an astronomical refracting telescope having an objective of focal length $16 \, m$ and an eye-piece of focal length $2 \, cm$. Which of the following statements is correct?

For a telescope,the focal length of the objective lens is $15\, cm$ and the focal length of the eyepiece is $10\, mm$. If the tube length is $16\, cm$,find the magnification.

The focal length of the objective of an astronomical telescope is $1.5 \ m$. Under normal adjustment,the length of the telescope is $1.56 \ m$. The focal length of the eyepiece is: (in $m$)

$A$ giant refracting telescope at an observatory has an objective lens of focal length $15 \, m$. If an eyepiece of focal length $1.0 \, cm$ is used,what is the angular magnification of the telescope?

Vedclass Test Series

Exam Paper Generator

Online Exam Module