Share

## An 7.5 × binocular has 3.7-cm-focal-length eyepieces. What is the focal length of the objective lenses? Express your answer to two significa

Question

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

## Answers ( )

To solve this problem we will apply the concept of magnification, which is given as the relationship between the focal length of the eyepieces and the focal length of the objective. This relationship can be expressed mathematically as,

Here,

= Magnification

= Focal length eyepieces

= Focal length of the Objective

Rearranging to find the focal length of the objective

Replacing with our values

Therefore the focal length of th eobjective lenses is 27.75cm