Photometry and Luminous Intensity - Class VIII

Casual Mode - Take your time!

1 / 53
✓
Correct
0
✗
Incorrect
0
★
Score
0%
Multiple Choice

A lamp placed 60 cm from a screen produces the same illumination as a standard 100 W lamp placed 90 cm away on the other side of the screen. The luminous intensity of the first lamp is 

  1. $49.44W$
  2. $44.44W$
  3. $54.44W$
  4. $34.44W$
Change Mode