MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price:

There are no items in this cart.
Continue Shopping
Menu
pranav narayan Grade:
        

A screen is placed D cm from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by d cm. Derive the formula for the focal length of the lens.


7 years ago

Answers : (1)

Ramesh V
70 Points
										

Distance between object and image, = D cm


Distance through which lens is displaced, = d cm


Now, D = u + v ; d = u - v


or    D = u + v ; d = v - u


where u = object distance and v= image distance


1/f = 1/u + 1/v


as (v+u)2 = (v-u)2 +4vu i.e., D2 -d2 = 4vu


f = vu/(v + u)


 focla length  =(D2 - d2)/4D


--


regards


Ramesh

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: 15,000
  • View Details
Get extra R 3,000 off
USE CODE: CART20
  • Kinematics & Rotational Motion
  • OFFERED PRICE: 600
  • View Details
Get extra R 120 off
USE CODE: CART20

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details