Question Paper
Class / Subject: Class 10 (CBSE) · Science
Chapter: Chapter 9 — Chapter 9: Light – Reflection and Refraction
Time Allowed: 15 minutes
Max Marks: 6
1. A convex mirror always forms a: [1]
(A) virtual, diminished image
(B) real, magnified image
(C) real, inverted image
(D) no image
2. The mirror formula is: [1]
(A) 1/v + 1/u = 1/f
(B) v + u = f
(C) v × u = f
(D) v/u = f
3. A concave mirror placed with a bulb at its focus is used in: [1]
(A) torches/headlights to produce a parallel beam
(B) side mirrors
(C) security systems
(D) sunglasses
4. A magnifying glass uses a: [1]
(A) convex lens
(B) concave lens
(C) plane mirror
(D) concave mirror
5. The power of a lens is measured in: [1]
(A) dioptres
(B) metres
(C) degrees
(D) watts
6. A concave lens has: [1]
(A) negative power
(B) positive power
(C) zero power always
(D) undefined power