NCERT SCIENCE 10 CH10 LIGHT - IN TEXT QUESTION ANSWER
THE PHYSICS CAFE CHAPTER TEN LIGHT: REFLECTION AND REFRACTION Ncert in-text Question Answer Page 168 Ncert Textbook Question 1: Define the principal focus of a concave mirror. Answer: Light rays coming parallel to the principal are converged at a point on its principal axis. Then this point is known as the principal focus of the concave mirror. Question 2: The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Answer: Given Data: Radius of curvature R = 20 cm We know that, R = f / 2 20 = f / 2 Hence, the focal length of the given spherical mirror is 10 cm. Question 3: Name the mirror that can give an erect and enlarged image of an object. Answer: Concave mirror ...