How to solve a metal light bulb puzzle? #shorts

A 124 W bulb converts only 15 % of the energy supplied to it into visible light of wavelength 640 nm . How many photons are emitted by the light bulb in one second ?

Estimate how many visible light photons a 100 W light bulb emits per second . Assume the bulb has a typical efficiency of about 3% (that is 97% of the energy goes to heat)

A light bulb is an incandescent source of light. A light bulb emits light

3 students {A, B, C} tackle a puzzle together and offers a solution upon which majority of the 3agrees. Probability of A solving the puzzle correctly is p. Probability of B solving the puzzle correctlyis also p. Cisa dumb student who randomly supports the solution of either A or B. There is one morestudent D, whose probability of solving the puzzle correctly is once again, p. Out of the 3 memberteam {A, B, C} and one member team {D}, which one is more likely to solve the puzzle correctly.

How many electrons flow through a light bulb each second if the current through the bulb is 1.6A ?

A bulb emits light of 4500 Å . The bulb is rated as 150 watt and 9 % of the energy is emited as light . How many photons are emitted by the bulb per second ?