Question:
A light source emits monochromatic light of wavelength $55 \mathrm{~nm}$. The source consume $100 \mathrm{~W}$ of electric power and emits $35 \mathrm{~W}$ of radiant flux. Calculate the overall luminous efficiency.
Solution:
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.