Dual Nature of ...

Two different sources of light A and B have wavelength $$0.7\mu m$$ and $$0.3\mu m$$ respectively. Then which of the following statement is true.

The effective mass of photon in microwave region, visible region and x -ray region is in the following order:

A particle of mass 1 mg has the same
wavelength as an electron moving with a
velocity of $$3\times 10^{6}ms^{-1}$$
The velocity of the
particle is :
$$\left ( mass of electron =9.1\times 10^{-31}kg \right )$$

The number of photo electrons emitted for light of a frequency v (higher than the threshold frequency $$v_0$$) is proportional to :

The correct curve between the stopping potential (V) and intensity of incident light (I) is 

Albert Einstein got a nobel prize in physics for his work on:

The photoelectric effect was successfully explained by

Einstein's photoelectric equation is

Louis de -Broglie is credited for his work on 

Name the unit in which work function of a metal is generally expressed.