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CBSE Class 10 Answered

I WANT TO UNDERSTAND LENS FORMULAE
Asked by deevyanshkumarsingh | 23 Mar, 2019, 09:00: AM
answered-by-expert Expert Answer
Lens formula is 
1/v -1/u= 1/f
Where v is distance of image from optical centre of lens
And u is the distance of object from optical centre of lens
And f is the focal length of lens
Direction along incident ray is taken as positive. 
Answered by Ankit K | 23 Mar, 2019, 08:18: PM

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CBSE 10 - Physics
If rays are coming from a different object to adouble convex lens with two different refractive indices Mu1 and Mu 2 above and below the principal axis, explain how many images will be seen?
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Asked by subrasixty | 13 Jan, 2024, 05:05: PM
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CBSE 10 - Physics
what is the magnification of the image when v=30 cm and u= 15cm
Asked by bubbynaik77 | 29 Sep, 2023, 09:34: PM
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CBSE 10 - Physics
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 | 01 Jun, 2021, 02:25: PM
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CBSE 10 - Physics
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 | 01 Jun, 2021, 11:09: AM
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CBSE 10 - Physics
solve x + y + z + u = 120 , 2x + y + 4 z+ 3y = 29 , 3x + 2y +z + 4u= 27, 4x + 3y +z +2u = 22. find x,y .z. u  
Asked by viraat.verma26 | 14 May, 2021, 01:10: PM
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CBSE 10 - Physics
f
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Asked by durgeshsri8080 | 01 Aug, 2020, 06:43: AM
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CBSE 10 - Physics
Tell concave lens convex lens sign convention  
Asked by arjukesharwani2006 | 25 Jul, 2020, 03:50: PM
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CBSE 10 - Physics
An object placed in front of the convex lens at a distance of 25cm on the principal axis.  The focal length of lens is 15cm, at what distance the image is formed and writes the nature and size of the image.  
Asked by craj.fru | 02 Sep, 2019, 09:45: AM
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CBSE 10 - Physics
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 | 21 Jul, 2019, 10:53: AM
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CBSE 10 - Physics
I don't know how to take focal length, image distance and object distance positive or negative in lenses and mirrors? 
Asked by lokendersikarwar6 | 10 Jun, 2019, 12:33: PM
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