A small metal plate is placed at a distance of from a monochromatic light source of…

PHYSICS · Subjective · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

A small metal plate is placed at a distance of

2\,\text{m}

from a monochromatic light source of wavelength

4.8\times10^{-7}\,\text{m}

and power

1.0\,\text{W}

. The light falls normally on the plate. Find the number of photons striking the metal plate per square metre per second.