Physics Class 10 Practical 22 Important Viva Questions with Answers (To verify laws of refraction using glass slab )
1.What is refraction? Refraction is the bending of light as it passes from one medium to another with a different density. 2.What are the laws of refraction? The first law states that the incident ray, the refracted ray, and the normal to the interface of two media all lie in the same plane. The second law, also known as Snell's Law, states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for a given pair of media. 3.What is Snell's Law? Snell's Law is n1sinθ1=n2sinθ2, where n1 and n2 are the refractive indices of the two media, and θ1 and θ2 are the angles of incidence and refraction, respectively. 4.What apparatus and materials are required for this experiment? The experiment requires a glass slab, a drawing board, pins, a protractor, a pencil, and a ruler. 5. Why do we use a glass slab for this experiment? A glass slab is used because it has a uniform thickness and its parallel faces make it easier to study t