The objective lens and the eyepiece of a telescope are spaced 85 cm apart. If the eyepiece is123 D what is the total magnification of the telescope?

The magnification would be "103.55". A further explanation is given below.

Explanation:

The given values are:

Distance between lens and eyepiece,

L = 85 cm

Eyepiece is,

= 123 D

Now,

The refractive power of eye piece will be:

⇒

The length of the telescope will be:

⇒

⇒

On substituting the values, we get

⇒    

⇒    

Now,

The magnification of the telescope will be:

⇒

⇒      

⇒      

would be false hope this out