MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Ajit Siddharth Grade:
        Two convex lenses A and B of focal length 10cm and 15 cm are separated by “d” distance and placed coaxially. A point object is placed on the axis at 20 cm from lens A. If final image is formed at infinity find the distance of separation “d”.
7 years ago

Answers : (1)

shalini goyal
37 Points
										

the correct ans is 35 cm....


soln:-.....for lens "A",


                             its focal length is 10 cm and object is at 20 cm 4m it,so it means obj is at 2f....so image will b 20 cm far apart it.....n u can also find it by d formula,


                                1/f=1/v-1/u.......where f,v and u are focal length,image distance and object distance from pole,


                         now (d-20) is the object distance for lens B,


             so,1/15=1/*-1/{-(d-20)}.....where * is infinity as given.....


          hense,d-20=15


                    d=35 cm

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete Physics Course - Class 12
  • OFFERED PRICE: Rs. 2,756
  • View Details
  • Complete Physics Course - Class 11
  • OFFERED PRICE: Rs. 2,968
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

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