An opera glass (Galilean telescope ) mea...

An opera glass `(`Galilean telescope ) measures `9cm` from the objective to the eyepiece. The focal length of the objective is `15 cm`. Its magnifying power is

2.5

`2/5`

`5/3`

0.4

Text Solution

Verified by Experts

The correct Answer is:

`M=(f_(0))/(f_(theta))`
`f_(0)=15`
`f_(0)-f_(theta)=9`
`f_(theta)=6`
`M=2.5`

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