Focal Length OF Lens||Lens In Medium||Lens Ray Diagram||Discussion OF Sheet Refraction By Spherical Surface Question -42 to 47

Discussion on Refraction at Spherical Surfaces and Lens

Ray Diagrams OF Lens

Refraction At Curved Surface|Questions|Lens|OMR

Spherical Surface||Refraction and thin Lens

Lens -Classification||Behaviour OF Lens in Different Medium||General Method to Solve Problem OF Lens|| Discussion OF Sheet- Section-2 (part-4 Q.12 to 23)

Spherical Refraction and Formula OF Lens

The focal length of the lens used in question 118 is

The focal length of a lens is -0.4m. The lens is

An equiconvex lens of refractive index mu_(1) , focal length 'f' and radius of curvature 'R' is immersed in a liquid of refractive index mu_(2) . For (i) mu_(2)gtmu_(1) , and (ii) mu_(2)ltmu_(1) , draw the ray diagrams in the two cases when a beam of light coming parallel to the principal axis is incident on the lens. Also find the focal length of the lens in terms of the original focal length and the refractive index of the glass of the lens and that of the medium.

The refractive index of a converging lens is 1.4. What will be the focal length of this lens if it is placed in a medium of same refractive index? Assume the radii of curvature of the faces of lens are R_(1) and R_(2) respectively.