CBSE X Physics Light - Reflection and Refraction
what will happen to the focal length of a concave mirror, convex mirror, concave lens and convex lens when immersed in water? will it change ? if yes explain .(3 marks)
Asked by Rida Mukadam
21st February 2015
7:43 PM
Answered by Expert
CBSE X Physics
I got to knew that when light passes through the optical centre, then it bent , but as the lens is very thin , this bent is negligible and thus we neglect it but when other rays passes through the lens(except optical centre) then why does they bent more?lens is thin so why should'nt we neglect it too??
Asked by jgprmr
17th June 2017
12:38 AM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
WHAT IS THE RAY DIAGRAM OF CONCAVE LENS WHEN OBJECT IS PLACED AT INFINITY?
PLEASE EXPLAIN IN DETAIL
Asked by modi72879
7th November 2017
9:41 AM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
WHAT IS THE RAY DIAGRAM OF CONCAVE LENS WHEN OBJECT IS PLACED AT FOCUS?
PLEASE EXPLAIN IN DETAIL
Asked by modi72879
7th November 2017
9:42 AM
Answered by Expert
ICSE X Physics
How to find the focal length of combination of lens
Asked by lovemaan5500
7th January 2018
6:58 AM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
An object is placed perpendicular to the principal axis of concave lens of focal length 30 cm. Find the position of an image when the object is at a distance 20 cm from the lens.
Asked by jullypradhan001
16th January 2018
8:16 AM
Answer Verified by Expert
CBSE XII Science Physics
A concave lens of active index 1.5 is immersed in a medium of refractive index 1.65. what is the nature of lens? give reason to ur ans.
Asked by vasturushi
1st February 2018
9:44 PM
Answered by Expert
CBSE X Physics
how can we identtify lens without touching it
Asked by janibirwa1
18th February 2018
12:00 PM
Answered by Expert
CBSE X Science
The far point of a myophic person is 40cm find the focal length and power of lence required for person
Asked by Ak9639315541
19th February 2018
3:03 PM
Answered by Expert
CBSE X Physics
A convave lens of focal length 15cm forms an image 10 cm from the lens.How far is the object placed from the lens ? Show the ray diagram
Asked by ihsanansar123
27th February 2018
4:15 PM
Answered by Expert
JEE Plances JEE (Main) Physics
plz solve the question with explanation
Asked by futureisbright051101
11th April 2018
6:46 AM
Answer Verified by Expert
ICSE X Physics Refraction Through a Lens
Q. 2
Asked by Rayeesa
25th April 2018
9:54 PM
Answered by Expert
CBSE X Physics
how can we identify the lenses experimentally
Asked by abhishekayush15
11th November 2018
10:15 AM
Answered by Expert
CBSE X Physics
how can we find the focal length of a mirror or lenses
Asked by abhishekayush15
11th November 2018
10:17 AM
Answered by Expert
Maharashtra X Physics
Distinguish between concave and convex lens
Asked by sangeeta735200
13th December 2018
7:52 PM
Answered by Expert
CBSE X Science
a person with a myopic eye cnnot see objects beyond 1.2m directly. what should be the type of the corrective lens used? what should be its power?
Asked by rs1702
24th December 2018
2:19 PM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
virtual image
Asked by ap.parthiban007
28th December 2018
10:13 AM
Answered by Expert
CBSE VIII Science
explain the difference concave convex mirror or lens
Asked by radheyshyammishra
12th January 2019
9:28 AM
Answered by Expert
CBSE X Physics The Human Eye and The Colourful World
Why 'u' in myopia is considered as infinity
Asked by pranjalbhagat7777
12th February 2019
10:01 AM
Answered by Expert
CBSE VIII Science Light
What is the difference between concave lens and concave mirror.?
Asked by gspublicschool
14th February 2019
1:50 PM
Answered by Expert
CBSE XII Science Physics
Lens combinations
Asked by alanpeter9611
24th February 2019
12:52 AM
Answered by Expert
ICSE X Physics
Riya claims to have obtained an image twice the size of the object with a concave lens. Is she correct? Give a reason for your answer
Asked by chumki.banerjee001
4th March 2019
8:02 AM
Answered by Expert
CBSE X Physics
What the sign of height of the image, height of the object, magnification of a concave lens?
Asked by Akkumon1858
9th March 2019
9:07 PM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
Why does a concave lens diverge a rays of light?
Asked by rushabhjain.a
10th March 2019
9:20 PM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
Derive lens formula for concave lens and state lens formula.
Asked by polyrelation
15th March 2019
4:40 PM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
Derive lens formula for concave lens and state lens formula.
Asked by polyrelation
15th March 2019
4:40 PM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12 cm from P. At what point does the beam converge if the lens is (a) a convex lens of focal length 20 cm, and (b) a concave lens of focal length 16 cm?
Asked by polyrelation
19th March 2019
8:29 PM
Answered by Expert
Gujarat X Physics
What is concave lens?
Asked by Aakashrajsah2
27th March 2019
7:46 PM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens ? Also calculate the size of the image formed.
Asked by muchu.mkk12345
21st July 2019
10:53 AM
Answered by Expert
CBSE X Physics
the magnification produced by a spherical lens is 1/3.if the image is formed at distance of 10cm from the lens,find the position of object . also find the nature and focal length of the lens.
Asked by bcnandi
6th November 2019
7:36 PM
Answered by Expert
CBSE X Physics
Why does refraction occur once in lens but twice in rectangular glass slab
Asked by saradamahapatra9999
23rd January 2020
8:01 AM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
A a concave lens has focal length of 15cm at what distance should be the object placed from the lens so that it is formed and image at 10 cm from the lens? What will be the nature and magnification of the image
Asked by malkabaswarai
27th March 2020
12:07 PM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
Which lens form virtual and erect image?
Asked by abhijeetkumar8513
10th April 2020
4:11 PM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
a person can see up to 1m the nature n power of which will enable him tosee things at 3m
Asked by manjulamurali1979
19th May 2020
9:01 PM
Answered by Expert
ICSE X Physics
do binocular lens use both concave and convex lenses? give reasons for using each lens?
Asked by saibaba1069
21st June 2020
7:52 PM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
In physics,what kind of image will be form when concave and convex mirror and in lens are kept together
Asked by kmbhuvanakmbhuvana
19th July 2020
2:28 PM
Answered by Expert
ICSE X Science
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
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
If a spherical lens has a power of, – 0.25 D, the focal length of this lens will be *
Asked by adipadmakarri
19th August 2020
9:01 AM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
9.Find the position and the size of the virtual image formed when an object of 2cm tall is placed 20cm from : a)diverging lens of focal length 40cm b) converging lens of focal length 40cm .Draw labelled diagrams to show the formation of image
Asked by arajeevshashank
12th October 2020
5:49 PM
Answered by Expert
CBSE VII Science Light
what is concave lenses
Asked by aartianu2006
13th December 2020
2:09 PM
Answered by Expert
CBSE X Physics
An object of height 1.5 cm is placed on the principal axis of a concave lens at a distance of 40 cm from it if the focal length of the lens is also 40 cm find the location of image height of image magnification and draw the ray diagram
Asked by prahladsumi
13th December 2020
5:44 PM
Answered by Expert
CBSE X Physics
An object is placed on the principle axis of a concave lens of focal length 10 cm. The distance of the object from the lens is 15 cm. Find nature and position of the image
Asked by akshaypolishetty
6th January 2021
3:18 PM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
Is convex always coverging or it depends on the conditions like refractive indices
Asked by nagendramanikireddy999999
29th May 2021
11:50 AM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
A concave lens has focal length of 30 cm. At what distance should the object be placed from the lens so that it forms an image at 20 cm from the lens ? Also, find the magnification produced by the lens.
Asked by lbalarajulbalaraju2
1st June 2021
11:09 AM
Answered by Expert
CBSE X Physics Light - Reflection and Refraction
A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed.
Asked by rk9154247
1st June 2021
2:25 PM
Answered by Expert
CBSE VIII Science Light
An image formed by a concave _______ cannot be obtained on screen
Asked by ejyothi44
22nd July 2021
4:14 PM
Answered by Expert
NEET NEET Physics Optics
explanation for silvering of one side in concave lens
Asked by myindiaisbad
6th July 2022
3:36 PM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
sole
Asked by hanskaraja
5th August 2022
11:20 PM
Answered by Expert
ICSE X Physics Light - Reflection and Refraction
A concave lens produces only _____________ image. a) real, enlarged b) virtual, enlarged c) virtual, diminished, d) real, diminished
Asked by paresh0311
17th March 2023
6:43 PM
Answered by Expert
CBSE XII Science Physics Ray Optics and Optical Instruments
obtain the lens formula in case of concave lens
Asked by marvellouskyndiah
17th May 2023
8:07 AM
Answered by Expert
