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
A board with a number of  green, blue and  red coloured  switches  is normally seen  near  the entrance of each house . What is the purpose of this board? What is the difference  a

new ideas for physics projects ?

DC high-current measurement: In common with many simple multimeters, both analogue and digital, the high current range (e.g. 10A) is not only selected using the range selector

Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on enhancing the (i)

What is the acceleration due to gravity and does the number ever change on earth

Instructors Own Problem: 1) On the surface of some strange planet, Mr. Spock finds his weight to be1200N. He then goes 5000km above the surface, and finds his weight to be on

WORK AND ENERGY   1.  Work can be defined as: the force applied in direction of displacement ×.  This means that if the force F acts at an angle θ with respect to the direct

Draw a free-body diagram for a submerged beach ball as it rises toward the surface just after being released. Recognize the forces acting on the beach ball and show the directi

What is a fiber optic? It is long lenses. A cylinder or rod of transparent material forming a core surrounded with an external cladding by a slightly dissimilar material. Ligh

molecular explanation of surface tension