defence exam SSB Head Constable (Communication) 2023 Mock Test Physics Optics Refraction and Reflection
Which of the following is/are true?
1. The power of a converging lens is positive.
2. The power of a diverging lens is negative.
Choose the correct code:
1
Neither 1 nor 2
2
Only 1
3
Both 1 and 2
4
Only 2