Dual Nature of ...

What is the ratio of wavelength of a photon and that of an electron of mass, m of the same energy $$E$$?

Calculate the momentum of particle whose de Broglie wavelength is $$2^oA$$.

An electron of mass 'm' has de-Broglie wavelength '$$\lambda$$' when accelerated through potential difference 'V'. When proton of mass 'M', is accelerated through potential difference $$9V$$, the de-Broglie wavelength associated with it will be : (Assume that wavelength is determined at low voltage)

A proton when accelerated through a potential difference of $$V$$, has a de Broglie wavelength $$\lambda$$ associated with it. If an alpha particle is to have the same de Broglie wavelength $$\lambda$$, it must be accelerated through a potential difference of:

In hydrogen spectrum, the wavelength of the line is 656 nm, where as in the spectrum of a distant galaxy, the line wavelength is 706 nm. Estimated speed of galaxy with respect to the earth is :

An electronic transition from $$M$$ shell (n = 3) to $$K$$ shell (n =1) takes place in a hydrogenatom. Find the wavelength of radiation emited. ($$R =$$ 109, 677 $$cm^{-1}$$).

Figure represents a graph of kinetic energy of most energetic photoelectrons Km (in eV) and frequency $$\upsilon$$ for a metal used as cathode in photoelectric experiment. The threshold  frequency of light for the photoelectric emission from the metal is

A particle A with a mass $$m_A$$ is moving with a velocity v and hits a particle B of mass $$m_B$$ at rest. If motion is one dimensional and take the collision is elastic, then the change in the de Broglie wavelength of the particle A is

Photons of wavelength $$\lambda$$ are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc of radius R by a perpendicular magnetic field having a magnitude B. The work function of the metal is (where symbols have their usual meanings).

Photoelectron emission is observed for three different metals A, B and C. The kinetic energy of the fastest photoelectrons versus frequency 'V' is plouted for each metal . Which of the following graphs shows the phemomenon correctly.