A biconvex thick lens is constructed with glass (mu = 1.50). Each of the surfaces has a radius of 10 cm and the thickness at the middle is 5 cm. Locate the image of an object placed far away from the lens.

Answer

A, C, D

Explanation

For local length of given lens
Using lensmaker's formula
`1/f=(mu-1)(1/R_1-1/R_2)`
`=(1.5-1)(1/10-1/(-10))`
`=0.5x2/10`
`rarr f=10 cm `

We know that the image is formed at focus of conve lens when object is at infinity.