PHYSICS MAM JKC

Experiment No .  9:  Refractive Index of Prism  Aim: To determine the angle of minimum deviation( δ)  for a given glass prism by plotting a graph between the angle of incidence (i) i i 𝑖 and the angle of deviation ( δ) Apparatus: Drawing board White paper sheets Glass prism Drawing pins

 Refractive index of convex lens using spherometer and auto collimation method Aim:   To determine refractive index of the material of given convex lens. Apparatus: A spherometer, a metre scale,  a double convex lens, a plane mirror, an index pin, a retort stand etc. Diagram : Result: Refractive index of material of the lens, n = 1.35 Precaution Use the same lens which we have used in spherometer experiment. Multiple Choice Questions Which principle is the auto-collimation method based on? A) Refraction at a single surface B) Total internal reflection C) The formation of a real image that coincides with the object when the object is at the center of curvature D) Snell's Law Answer: C In the auto-collimation method to find the focal length ( f f 𝑓 ) of a convex lens, where should the optical needle be placed to coincide with its inverted image? A) At the focal point (F) B) At the center of curvature (2F) C) At infinity D) Between F and the optical center Answer: A T...

  EXPERIMENT NO. 2: Focal Length of a Convex Lens by Displacement Method Aim: To determine the focal length of a convex lens using the displacement method . Principle (Displacement Method): The displacement method is a technique used to accurately determine the focal length of a convex lens. It is based on the principle of reversibility of light and the property of a convex lens to form both real and virtual images . If an object is placed at a distance u from a convex lens, and its real image is formed at a distance v from the lens, then the lens formula is:  (ignoring sign convention for magnitudes) In the displacement method, for a given fixed distance D between a real object and a screen, a convex lens can form a sharp, real, and inverted image on the screen at two different positions (L₁ and L₂), provided that D > 4f . Let the distance between the object and the screen be D. Let the distance of the first position of the lens from the object be u₁. Then the dista...

. 🔬 3. Activity: Rolling Friction Aim: To determine the force of limiting friction for rolling of a roller on a horizontal plane. Principle: When an object rolls on a surface, the point of contact between the object and the surface is instantaneously at rest. However, due to slight deformation of both the rolling object and the surface, a small area of contact is formed rather than a single point. This deformation leads to a resistance to rolling motion known as rolling friction. Rolling friction is generally much smaller than static or kinetic (sliding) friction. The force of limiting rolling friction is the maximum rolling friction that needs to be overcome to initiate or sustain rolling motion without slipping. Apparatus: Roller: A cylindrical object (e.g., a hollow metal cylinder, a wooden dowel, or a disc that can roll). Ensure it has a uniform shape and mass distribution. Horizontal Plane: A smooth, flat, rigid surface (e.g., a polished wooden plank, a glass sheet, or a marbl...