A photon is________________? April 17, 2025 by admin A. A unit of energy B. A positively charged particle C. A quantum of electromagnetic radiation D. A unit of wavelength
Which one of the following has the largest energy content ? April 17, 2025 by admin A. 103 photons of wavelength 2 pm (γ-rays) B. 102 photons of wavelength 1nm (x-rays) C. 106 photons of wavelength 50?m (infrared) D. 106 photons of wavelength 200nm (UV)
A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ? April 17, 2025 by admin
After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________? April 17, 2025 by admin A. Increases because wavelength decreases B. Decreases because speed decreases C. Remains same D. Increases then decrease
In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________? April 17, 2025 by admin A. Becomes double B. Remains same C. Becomes half D. First increases then decrease because of the curvilinear graph
If the wavelength of incident radiation is increased in photoemission then_________________? April 17, 2025 by admin A. The maximum kinetic energy of the photoelectrons increases B. The minimum kinetic energy of the photoelectrons decreases C. The minimum kinetic energy of the photoelectrons increases D. The average kinetic energy of the photoelectrons decreases
If a photon is reflected from the mirror then the change in momentum of each photon is_______________? April 17, 2025 by admin A. Zero B. Double C. Half D. 1
If n number of the photon is striking on a metal surface then total momentum exerted is_______________? April 17, 2025 by admin A. p B. n C. 0 D. None
A photon of wavelength 900nm behaves like a particle of mass______________? April 17, 2025 by admin A. 5.53 x 10-36kg B. 0 kg. C. 2.46 x 10-36kg D. 1.84 x 10-44kg
The velocity of a particle of mass m of de-Broglie wavelength λ is______________? April 17, 2025 by admin A. v = 3 ×× 106 ms-1 B. v = 2 ×× 10 ms-1 C. v = 2 ×× 6 ms-1 D. v = 2 ×× 106 ms-1
