A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525nm, how many photons are emitted per second?

photons are emitted per second.

Explanation:

Let the number of photons emitted by bulb be 'n'.

Given:

Energy radiated by bulb per second (E) = 100 J

Wavelength of light emitted (λ) = 525 nm =

We know that,

Energy of a photon is given as:

Where,

Now, if there are 'n' photons, the energy will be equal to energy of 1 photon times the number of photons. So,

Now, rewriting in terms of 'n', we get:

Plug in the values given and solve for 'n'. This gives,

Therefore, photons are emitted per second.

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

increase masses, decrease separation