Reflection at Spherical Surface | 12th Physics | Chapter 09 | By Sourabh Sir

Class 12th Physics | Easy & Hard Most Important Chapters

The spherical surface of a plano-convex lens comes into contact with a glass plate. The space between the lens and the plate is filled up with carbon dioxide. The refractive indies of the lens, carbon dioxide, and the plate are equal to n_(1) = 1.50, n_(2) = 1.63 , and n_(3) = 1.70 respectively. the curvature radius of the spherical surface of the lens is equal to R = 100 cm . Determine the radius of the fifth dark Newton's ring in reflected light with wavelength lambda = 0.50 mu m .

Two plano-convex thin glass lenses are brought into contact with their spherical surfaces. Find the optical power of such a system if in reflected light with wavelength lambda = 0.60 mu m the diameter of the fifth bringht ring is d = 1.50 mm .

Find the flux of the electric field through a spherical surface of radius R due to a charge of 8.85xx10^(-8) C at the centre and another equal charge at a point 3R away from the centre (Given : epsi_(0) = 8.85 xx 10^(-12) units )

At the crest of a spherical surface of a plano-convex lens there is a ground-off plane spot of radius r_(0) = 3.0mm through which the lens comes into contact with a glass plate. The curvature radius of the sixth bright ring when observed in reflected light with wavelength lambda = 655 nm .

A spherical mirror is placed 10 cm below the level of water. A point oject is placed in air 30 cm above the water surface on the axis of the mirror such that two images seen by an observer above the water surface coincide. The images are formed by partial reflection at the water surface and due to emerging light after feflection from the mirror. Find the focal length of the mirror. (mu_("water")=(4)/(3))

12th Maths Chapter Wise Weightage 2023-24