QUESTION #12 Photoelectric Effect

In photoelectric effect, the stopping potential (V_0$V_{0}$) v/s frequency ( u$ u$) curve is plotted. (h$h$ is the Planck's constant and phi_0$\phi_0$ is work function of metal) (A) V_0$V_{0}$ v/s u$ u$ is linear (B) The slope of V_0$V_{0}$ v/s u$ u$ curve = fracphi_0h$\frac{\phi_{0}}{h}$ (C) h$h$ constant is related to the slope of V_0$V_{0}$ v/s u$ u$ line (D) The value of electric charge of electron is not required to determine h$h$ using the V_0$V_{0}$ v/s u$ u$ curve. (E) The work function can be estimated without knowing the value of h$h$. Choose the correct answer from the options given below :

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QUESTION #17 Relativistic Mechanics

The energy E and momentum p of a moving body of mass m are related by some equation. Given that c represents the speed of light, identify the correct equation.

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QUESTION #23 Photon Theory of Light

The ratio of the power of a light source S_1$S_{1}$ to that the light source S_2$S_{2}$ is 2. S_1$S_{1}$ is emitting 2 times 10^15$2 \times 10^{15}$ photons per second at 600 nm. If the wavelength of the source S_2$S_{2}$ is 300 nm, then the number of photons per second emitted by S_2$S_{2}$ is ____ times 10^14$\times 10^{14}$ .

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