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CBSE Class 10 Answered

Define main focus of convex lens
Asked by malkeetranu748 | 15 Feb, 2020, 08:05: PM
answered-by-expert Expert Answer
The principal focus of convex lens is a point at which the light rays travelling parallel to principal axis converge after passing through the lens.
 
Convex lens have two focii at equal distance from optical centre of lens, each on either side of a lens  
Answered by Shiwani Sawant | 15 Feb, 2020, 11:56: PM

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CBSE 10 - Physics
image 1 cm long of object is formed on a screen by convex lens keeping the object and the screen is the lens is moved until a s image is formed on the screen if the image of 0.75 cm long what is the lenght of the object
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Asked by rathodveeru41 | 19 Dec, 2020, 10:33: AM
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CBSE 10 - Physics
power of a lens is found to be + 2.5 Diopter what kind of lens is it
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CBSE 10 - Physics
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
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 If a spherical lens has a power of, – 0.25 D, the focal length of this lens will be *
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