Physicseasy · Past Paper
What is the power of a lens having a focal length of 0.5 meters?
A+1 D
B-2 D
C+2 D
D+0.5 D
✓ Correct Answer: C — +2 D
Using the formula P = 1/f(m), we get P = 1/0.5 = +2 Dioptre.
Share this question
More from Physics
- As we go higher from the sea level, atmospheric pressure:
- A body of volume 0.1 m^3 is fully immersed in water. Calculate the upthrust. (density of water = 1000 kg/m^3, g = 10 m/s^2)
- A hydraulic lift has pistons of radii 1cm and 10cm. What is the force multiplier?
- The pressure at a point inside a liquid does not depend on:
- Which of these factors does NOT affect the induced EMF in a coil?