Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
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

A thin convex lens of focal length 10 cm is placed over a plane glass mirror. An object is placed 20 cm above the lens.Find the distance of image from the object.

A thin convex lens of focal length 10 cm is placed over a plane glass mirror. An object is placed 20 cm above the lens.Find the distance of image from the object.

Grade:

1 Answers

Askiitians Expert Soumyajit IIT-Kharagpur
28 Points
10 years ago

Dear Ajit,

The image distance after 1st refraction by the lens is=20 cm towards the plane mirror (simply from the lens formulae)

but it will get reflected from the mirror and will try to form at a distance 20 cm in front of the lens. it will then again rf\efracted by the lens and this time u=+20 cm

So again using lens formulae we get, v=20/3 cm from the lens towards the object.

Hence the distance between the image & the object will be=(20 - 20/3)cm

                                                                               =40/3 cm

 

Please feel free to post as many doubts on our discussion forum as you can. If you find any question
Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We
are all IITians and here to help you in your IIT JEE preparation.
win exciting gifts by answering the questions on Discussion Forum.

All the best Ajit!!!

 


Regards,

Askiitians Experts

SOUMYAJIT IIT_KHARAGPUR

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free

10th iCAT Scholarship Test Registration Form