Question 1 :
If h is Plancks constant, the momentum of a photon of wavelength 0.01 $A^o$ is
Question 3 :
Who first proposed that the light exhibits wave nature and explained wave phenomenon?
Question 4 :
By means of the diffraction experiment, it is determined that the electron's de Broglie wavelength is $6.6 \times {10}^{-10} m$. What is the electron's linear momentum? Use Planck's constant, $h = 6.6 \times {10}^{-34} J{A} s$.<br/>
Question 6 :
De-Broglie wavelength of an atom at absolute temperature $T\ K$ will be
Question 8 :
If the mass of a microscopic particle a well as its speed are halved, the de-broglie wavelength associated with the particle will
Question 9 :
de-Broglie wavelength associated with an electron revolving in the $n^{th}$ state of hydrogen atom is directly proportional to
Question 10 :
A microscopic particle of mass $10^{-12}$ kg is movingwith a velocity of $10^{2}$ m/s. Then the de-Brogliewavelength associated with the particle is<br>
Question 12 :
__________ is the wavelength of photon of energy $35$KeV.<br>$h=6.625\times 10^{-34}$J-s, $c=3\times 10^8$m/s, $1$eV$=1.6\times 10^{-19}$J.<br>
Question 13 :
For a certain metal $v$ is five times the $v_{0}$ and the maximum velocity of coming photo-electrons is $8 \times 10^{6}$. If $v=2v_{0}$, the maximum velocity of photo electrons will be :<br/>
Question 14 :
A proton and an $\alpha$ particle are accelerated through the same potential difference V. The ratio of their de Broglie wavelengths is?
Question 16 :
In a photo-emissive cell with exciting wavelength $\lambda$, the fastest electron has speed $v$. If the exciting wavelength is changed to $3 \lambda/4$ the speed of the fastest emitted electron will be :
Question 17 :
A particle moving with kinetic energy E has de Broglie wavelength $\lambda$. If energy $\Delta E$ is added to its energy, the wavelength become $\lambda /2$. Value of $\Delta E$, is?
Question 18 :
Representing the stopping potential V along y-axis and $(1/\lambda)$ along x-axis for a given photocathode, the curve is a straight line, the slope of which is equal to<br>