Wave motion-lenses, Physics

You are given 3 lenses l1,l2,l3 each of focal length 20 an object at 40cm in front of l1.the final real image is formed at focus i ofl3,find separation between l1,l2,l3 ?

Ans) between l1&l2 its 60

& between l2&l3 it can be any value...........

for l3 to form image at i, the object must be at infinity, and for that, image formed

by l1 must be at the focus of l2,

and also image formed by l1 is 40 cm ahead of l1, i.e., the focus of l2(20 cm)

so, distance between l1 and l2 is 40+20=60 cm........

Posted Date: 3/8/2013 7:53:20 AM | Location : United States

Related Discussions:- Wave motion-lenses, Assignment Help, Ask Question on Wave motion-lenses, Get Answer, Expert's Help, Wave motion-lenses Discussions

Write discussion on Wave motion-lenses
Your posts are moderated
Related Questions


Similarities in Construction of MOSFET and JFET (i)  JFET is a three terminal semiconductor device (source, drain and gate) in which current conduction is by majority carriers

The P.D. at the feeder end of a two wire d.c. distributor is 600 volts. Two loads are connected to the distributor at distances of 600 feet and 1000 feet from the feeder end and t

A baseball bat strikes a ball with a force of 30 newtons.  If the ball was in contact with the bat for 1/10 of a second, What impulse did the ball receive? Ans - 3 Newt

Which gates are known as universal gates? Draw the circuit symbols of n-p-n and p-n-p transistor.

Describe coefficient of self induction, coefficient of mutual induction. What types of transformer is used in a bed lamp.

Truck has a 100 kW engine power and 40 % efficiency . As oil burn in an hour if q = 4.4 to force multiplication 10 to 7 ?

Explain Squirrel- cage rotor Squirrel- cage rotor having of a slotted laminated core of sheet-steel. The slots of the rotor are not always parallel to the slots on the stator,

as flux = E.A and flux density is equal to flux/A then why A/A cannot e cancelled ?