प्रकाश विद्युत प्रभाव (Photoelectric effect) किसके संरक्षण के नियम पर आधारित है?

A bulb is rated at 150 W and converts 8% of its input energy into light. If the energy of one photon is 4.42 × 10-19 J, how many photons are emitted by the bulb per second?

For a metal with a work function of 6.6 eV, which of the following wavelengths of incident radiation will NOT cause the photoelectric effect? (Take Planck's constant h = 6.6 × 10-34 J s and c = 3 × 108 m/s)

Match List I with List II: List I A. E = hν B. Diffraction and Interference C. λ = h/p D. Compton effect List II I. de Broglie wavelength II. Particle nature of light III. Wave nature of light IV. Energy of photon Choose the correct answer from the options given below:

A metal has a work function of 2 eV. What is the minimum energy required (in joules) to emit an electron from its surface?

Emission of electrons from a metal plate illuminated with monochromatic electromagnetic radiation will always take place provided:

A particle of mass M at rest decays into masses m1 and m2 with non-zero velocities. The ratio of de Broglie wavelengths λ1 and λ2 of the particles is:

When an electron is accelerated through a potential V, the de-Broglie wavelength associated with it is 4λ. When the accelerating potential is increased to 4V, its wavelength will become:

Monochromatic light of wavelength 667 nm is produced by a helium-neon laser. The power emitted is 9 mW. The average number of photons arriving per second at a target irradiated by this beam is: (Given h = 6.63 × 10-34 J·s)