MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
indrayani bargaje Grade: 10
        a convex lens and a concave lens with equal focal length are cemented together and exposed  to a beam of light falling on the combination symmetrically with respect to optical axes. find the distance aT WHICH THE BEAM WILL COME TO A frocus on the other side of the lens.

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

combined focal length = f


1/f = 1/f1 + 1/f2 - d/f1f2


when lences are kept very close then d =0


1/f = 1/f1 + 1/f2


f1 = -F  (concave)


f2 = F (convex)


1/f = 0


f = infinity


so when parallel beam of light is incident then image is formed at focus = infinity ..

6 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete AIPMT/AIIMS Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 4,500 off
USE CODE: SSP3
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 4,500 off
USE CODE: SSP3

Ask Experts

Have any Question? Ask Experts

Post Question

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