Question Paper
Class / Subject: Class 10 (SSC) · Science and Technology (विज्ञान आणि तंत्रज्ञान)
Chapter: Chapter 7 — Chapter 7: Lenses
Time Allowed: 32 minutes
Max Marks: 16
1. What is the lens formula? [1]
(A) 1/v - 1/u = 1/f
(B) 1/v + 1/u = 1/f
(C) v-u=f
(D) v+u=f
2. What does a convex lens do to light? [1]
(A) Converges it
(B) Diverges it
(C) Blocks it
(D) Absorbs it
3. What does a concave lens do to light? [1]
(A) Diverges it
(B) Converges it
(C) Blocks it
(D) Absorbs it
4. What type of image does a concave lens always form? [1]
(A) Virtual, diminished, upright
(B) Real, magnified, inverted
(C) Real, diminished, upright
(D) Virtual, magnified, inverted
5. What condition does a concave lens correct? [1]
(A) Myopia (short-sightedness)
(B) Hypermetropia (long-sightedness)
(C) Colour blindness
(D) Astigmatism only
6. What condition does a convex lens correct? [1]
(A) Hypermetropia (long-sightedness)
(B) Myopia (short-sightedness)
(C) Colour blindness
(D) Nothing specific
7. What is the magnification formula? [1]
(A) m=v/u
(B) m=u/v
(C) m=v+u
(D) m=v-u
8. Why learn about lenses? [1]
(A) To understand image formation and vision correction
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is the lens formula? [1]
(A) 1/v - 1/u = 1/f
(B) 1/v + 1/u = 1/f
(C) v-u=f
(D) v+u=f
10. What does a convex lens do to light? [1]
(A) Converges it
(B) Diverges it
(C) Blocks it
(D) Absorbs it
11. What does a concave lens do to light? [1]
(A) Diverges it
(B) Converges it
(C) Blocks it
(D) Absorbs it
12. What type of image does a concave lens always form? [1]
(A) Virtual, diminished, upright
(B) Real, magnified, inverted
(C) Real, diminished, upright
(D) Virtual, magnified, inverted
13. What condition does a concave lens correct? [1]
(A) Myopia (short-sightedness)
(B) Hypermetropia (long-sightedness)
(C) Colour blindness
(D) Astigmatism only
14. What condition does a convex lens correct? [1]
(A) Hypermetropia (long-sightedness)
(B) Myopia (short-sightedness)
(C) Colour blindness
(D) Nothing specific
15. What is the magnification formula? [1]
(A) m=v/u
(B) m=u/v
(C) m=v+u
(D) m=v-u
16. Why learn about lenses? [1]
(A) To understand image formation and vision correction
(B) No reason
(C) It's not useful
(D) Only for tests