Nootan Solutions Ch-16 Lenses Refraction of Light at Spherical Surface ISC Class-12 Physics Nageen Prakashan Numericals. Step by step Numerical Questions Solutions of Kumar and Mittal ISC Physics Class-12 Nageen Prakashan Numericals Questions. Visit official Website CISCE for detail information about ISC Board Class-12 Physics.

## Nootan Solutions Ch-16 Lenses Refraction of Light at Spherical Surface ISC Class-12 Physics Nageen Prakashan

 Board ISC Class 11 Subject Physics Publication Nageen Prakashan Writer Kumar and Mittal Vol 2nd Book Name Nootan Chapter-16 Lenses : Refraction of Light at Spherical Surface Topics Solution of Numericals Questions Page-Number 707, 708 , 709, 710

### Nootan Solutions Ch-16 Lenses Refraction of Light at Spherical Surface

( ISC Class-12 Physics Nageen Prakashan Kumar and Mittal Numericals )

the important terms related refraction in concave and convex lenses:

1. Centre of Curvature: The centre of the actual glass sphere, of which your lens forms a part
2. Principal Axis: When two spheres are part of your lens, it is the imaginary line joining the centres of curvatures of both spheres.
3. Principal Focus: It is point on the principal axis, where light rays parallel to principal axis meet in case of a convex lens (or appear to meet after extrapolation in case of a concave lens).
4. Optical Centre: It is a point within the lens where the diameter of the lens and the principal axis meet
5. Focal Length: The distance between the focus and the optical centre

For any curved surface area,

This is the relation between object and image distance in terms of the refractive index of the medium and the radius of curvature of the curved spherical surface

### Refraction by Lenses and Lens Maker’s Formula:

A lens is a homogeneous transparent medium bounded by two curved surfaced or one curved an one plane surface. The curved surface may be spherical, cylindrical or paraboloidal; but most of the surfaces are spherical.

#### Lens maker’s formula

From the Lens Maker’s formula, it is clear that for refraction of light through a lens that the focal length f also depends upon the radii of curvature R1 and R2 of its surfaces. For a double convex lens, R1 is positive and R2 is negative. This is why; the air bubble (whose surface is convex) behaves as a concave lens inside water.

### linear magnification

The linear magnification produced by the spherical lens is the ratio of the size of the image formed by the lens to the size of the object, both measured perpendicular to the principal axis.

### Power (P) of a lens:-

Power (P) of a thin lens is equal to the reciprocal of its focal length (f) measured in meter. The S.I. Unit for the power of a lens is Dioptre’.

#### Nootan Numericals Ch-16 Lenses Refraction of Light at Spherical Surface

( ISC Class-12 Physics Nageen Prakashan Kumar and Mittal Numericals )

Page-707, 708,709

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#### Nootan Numericals Ch-16 Lenses Refraction of Light at Spherical Surface

( ISC Class-12 Physics Nageen Prakashan Kumar and Mittal Numericals )

#### Nootan Numericals Ch-16 Lenses Refraction of Light at Spherical Surface

( ISC Class-12 Physics Nageen Prakashan Kumar and Mittal Numericals )

Page-709, 710

Oue-31 to 63

—: End of Nootan Solutions Ch-16 Lenses Refraction of Light at Spherical Surface

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