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
pankaj bhatia Grade: 12
        

a screen is placed 40 cm away from illuminated object.a converging lens is placed b/w the source and screen and it is attempted2 form image of the source on the screen.If no position could be formedbe formed, focal lens of lens is


a)  <10cm


b)  >20cm


c)  <20cm


d) >10cm


 

7 years ago

Answers : (1)

Chetan Mandayam Nayakar
312 Points
										

(1/u)+(1/(40-u))=1/f,upon doing the easy algebra and simplifying, we get; u^2 -40u+40f=0, if no solution can be formed the quadratic equation in u has no real roots implying that its discriminant is negative, 1600<160f, f>10cm

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
  • Kinematics & Rotational Motion
  • OFFERED PRICE: Rs. 636
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

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