By suitable example show that particle or wave nature depend on type of experiment.
When we see an object by our eye particle and wave nature both are important.
The gathering and focussing mechanism of light by eye lens is well described in wave picture.
Absorption of light by cone and rod cells on retina require photon picture of light.
The electrons are emitted in the photoelectric effect from a metal surface
What is the momentum of a photon having frequency $1.5 \times {10^{13}}Hz$
The energy of a photon of light with wavelength $5000\,\mathop A\limits^o $ is approximately $2.5\, eV$. This way the energy of an $X-$ ray photon with wavelength $1\,\mathop A\limits^o $ would be
A photon of wavelength $6630 \ Å$ is incident on a totally reflecting surface. The momentum delivered by the photon is equal to
In a dark room of photography, generally red light is used. The reason is