Dual Nature of ...

An electron and a proton are accelerated through the same potential difference. The ratio of their de Broglie wavelengths ($$\dfrac{\lambda_{e}}{\lambda_{p}}$$ ) is

The de-Broglie wavelength associated with an electron accelearated to potential difference of V volt is:

The de Broglie wavelength of a neutron when its kinetic energy is K is $$\lambda$$ .What will be its  wavelength when its kinetic energy is 4K ?

The de Broglie wavelength associated with an electron of velocity 0.3c and rest mass $$9.1 \times 10^{-31}$$kg is

A proton when accelerated through a potential difference of V volt has wavelength $$\lambda$$  associated with it .An electron to have the same $$\lambda$$  must be accelerated through a p.d of

The de Broglie wavelength of an electron which falls through a p.d. of 10,000V is

Monochromatic light of wavelength 667 nm is produced by a helium neon laser. The power emitted is 9 mW. The number of photons arriving per second on the average at a target irradiated by this beam is :

The velocity of electron of H-atom in its ground state is $$2.2\times 10^{-6} m/s$$. The de-Broglie wavelength of this electron would be:

The de-Broglie wavelength of an electron traveling with speed equal to 1% of the speed of light:

Tungsten has work function 4.8 $$eV$$ . We wish to use tungsten as photo-cathode with a 600 $$nm$$ wavelength. What shall we do?