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## Why does'nt  power of lens depends on refractive index of lens because more the refractive index, more strongly it will bent tge light( as high refractive index will increase the angle of refraction)

Asked by akshaykhanna6162 18th June 2017 2:59 AM

## A LUMINOUS OBJECT IS PLACED AT A DISTANCE OF 30CM FROM THE CONVEX LENS OF FOCAL LENGTH 20CM.ON THE OTHER SIDE OF THE LENS,AT WHAT DISTANCE FROM THE LENS A CONVEX MIRROR OF RADIUS OF CURVATURE 10CM BE PLACED IN ORDER TO HAVE AN UPRIGHT IMAGE OF THE OBJECT COINCIDENT WITH IT?A-12CM,B-30CM,C-50CM,D-70CM

Asked by Priyanka 13th November 2017 4:04 PM

## THE DISPERSIVE POWER OF THE MATERIAL OF TWO LENSES ARE IN RATIO 4:3 .IF THE ACROMATIC COMBINATION OF THESE TWO LENSES IN CONTACT IS A CONVEX LENS OF FOCAL LENGTH 60CM,THEN FOCAL LENGTH OF THE COMPONENT LENSES ARE?A,-20CM AND +25 CM,B,-20 AND -25,C,-15 AND +20

Asked by Priyanka 13th November 2017 4:09 PM

## The Plane face of the Plano convex lens of focal length 20cm is silverd. What type of mirror will it behave and of what focal length? A-convex, f=20cm vice versa. B-convex focal length 10cm or vice-versa

Asked by Priyanka 13th November 2017 9:43 PM

## A SCREEN IS PLACED 90 CM FROM AN OBEJCT. THE IMAGE OF THE OBJECT ON THE SCREEN IS FORMED BY A CONVEX LENS AT TWO DIFFERENT LOCATIONS SEPARATED BY 30 CM. FIND THE FOCAL LENGTH OF THE LENS.

Asked by sohamsouthpoint02 30th December 2017 1:28 AM

## An image formed on a screen is three times of the object .The object and screen are 80 cm apart when the image is sharply focused.Calculate the focal length of the lens.

Asked by Rajendra Beniwal 11th January 2018 4:20 PM

## plz solve the question with explanation

Asked by futureisbright051101 11th April 2018 6:48 AM

## Given ,            h=5 , f=12, u=8cm,v=?          By lens formula

Asked by panchalrajveer96 21st October 2018 7:26 AM