Practicing Success
Two monochromatic light sources, A and B, emit the same number of photons per second. The wavelength of A is $\lambda_A = 400 nm$, and that of B is $\lambda_B = 600 nm$. The power radiated by source B is : |
equal to that of source A less than that of source A greater than that of source A cannot be compared to that from source A using the available data |
less than that of source A |
More the wavelength, lesser is the kinetic energy and so lesser is the power radiated. $P = \frac{Nhc}{\lambda}$ $\frac{P_B}{P_A} = \frac{\lambda_A}{\lambda_B} <1$ $\Rightarrow P_B < P_A$ |