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Lens Formula

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

a converging lens has a focal length of 23cm in Air. it is made up of a material of refractive index 1.5 . it is immerersed in a liquid of refractive index 1.2 . calculate its new focal length.

Asked by sandeepsingh78602 7th December 2018 3:27 PM

Establish the formula of lens. 1/f=(meu-1)(1/R-1/R')

Asked by Ravishankarpoddar652 3rd January 2019 9:22 AM

An object placed on ameter scale at 8 cm mark was focused on a white screen placed at 92 cm mark,using a converginglens placed on the meter scale at 50 cm mark. a)  find the focal length of the converging lens b) find the position of the image formed if the object is shifted towards the lens at a position of 29 cm c) state the nature of image formed if the object is further shifte towards the lens.

Asked by rs1702 7th January 2019 12:09 PM

establish lens equation and establish lens market formulas

Asked by anindita00002 18th February 2019 1:18 PM

The magnification of an image formed by a lens is – 1. If the distance of the image from the optical centre of the lens is 35 cm, where is the object placed ? What is the nature and focal length of the lens ? If the object is displaced 20 cm towards the optical centre of the lens, where would the image be formed and what will be its nature ? Draw a ray diagram to justify your answer.

Asked by biotechckt 10th March 2019 11:45 AM

Derive lens formula for convex lens.

Asked by polyrelation 14th March 2019 9:16 PM

I WANT TO UNDERSTAND LENS FORMULAE

Asked by deevyanshkumarsingh 23rd March 2019 9:00 AM

A converging lens of refractive index 1.5 and of focal length 15 cm in air, has the same radii of curvature for both sides. if it is immersed in a liquid of refractive index 1.7, Calculate the focal length of the lens in the liquid?

Asked by satya785583 24th March 2019 10:58 AM

The object 5cm high is placed in front of a lens of power +2D. Two times real and magnified image of the object is attained by the lens. Find 1)Object distance 2)Image distance 3)height of the image

Asked by katariayash1212 17th June 2020 1:06 PM

as object distance is decreased zero, that is the object is held very close to the lens ,the images in a diverging lens and converging lens become almost similar. can you find a simple qualitative explanation as to why? is there one different still?

Asked by kumargangwarn 19th July 2020 3:56 PM

The radius of curvature of two faces of double convex lens are 10cm,15cm and its focal length is 12cm. Then determine refractive index of lens

Asked by abdibnzubair 6th October 2020 12:52 PM

CAN U SEND ME THE IMPORTANT FORMULAE IN LIGHT REFLECTION AND REFRACTION

Asked by chandukoppararpu 14th October 2020 7:45 PM

define lens maker formula

Asked by bmahalik21 4th March 2023 7:03 PM

obtain the lens formula in case of concave lens

Asked by marvellouskyndiah 17th May 2023 8:07 AM