Physics question and answers for October 11, 2023
- Q 2. The frequency of violet light is 7.5 x 104 Hz. How much energy does a photon of violet light carry? (h= 6.626 x 10-34 J-s; 1 eV = 1.60...
- Q A cylindrical rod of some laser material 5 x 10-2m long and 10-2m in diameter contains 2 1025 ion per m. If on excitation all the ions are in the...
- Q A Laser light of wavelength 600nm is used to weld retina detachment. If a Laser pulse of width 60ms and 0.5kW is used the approximate number of photons in the...
- Q In Young's double slit experiment the separation d between the slits is 2mm, the wavelength of light used is 5896A and distance D between the screen and slits is 100...
- Q Carbon, silicon and germanium have four valenceelectrons each. These are characterised by valenceand conduction bands separated by energy bandgap respectively equal to (Eg)c, (Eg) si and(Eg) Ge .Which of the...
- Q Calculate the maximum wavelength, Amax, of electromagnetic radiation that could eject electrons from the surface of aluminum, which has a work function of 6.50 x 10^-19 J.If the maximum speed...
- Q 1. Which of the following is true about the Joly Photometer?You can use the Joly Photometer to measure the absolute brightness (in W/m for example) of a light source.You can...
- Q Two stars, both of which behave like ideal blackbodies, radiate the same total energy per second. The cooler one has a surface temperature T and 3.5 times the diameter of...
- Q 2. Consider a metal exposed to light of wavelength 600 nm. The maximum energy of the electron doubles when light of wavelength 400 nm is used. Find the work function...
- Q An electron microscope is using a 1.00-keV electron beam. An atom has a diameter of about 10-10 meters.Can an individual atom theoretically be resolved using this electron microscope?
- Q When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV.What is the maximum kinetic...
- Q If h/mc is very very large compared to the wavelength of the radiation that you're sending in to hit the electron, then this shift in wavelength is going to be.........
- Q Tungsten has electron shell binding energies of: K = 69 keV, L = 12 keV, M = 2 keV. A 60 keV electron striking a tungsten target could cause emission...
- Q The threshold wavelength of photoelectric emission from a material is550 nm. Photoelectrons will be emitted when this material isilluminated with monochromatic radiation from a0.10 W infrared lamp100 W infrared lamp0.10...
- Q Calculate the speed of the fastest photoelectron emitted from tungsten surface when irradiated with photons of energy 5.8 eV. [Photoelectric work function of tungsten = 4.5 eV]
- Q Photons of frequency, v, fall on metal surface for which the threshold of frequency is ?. ThenA. All ejected electrons have the same kinetic energy, h(? ??).B. The ejected electrons...
- Q The Sun has a power of P = 3.85 x 1026 Watts. The Earth is a distance of (on average) 1.49 x 108 km away from the Sun. A solar...
- Q 1 d Find the de Broglie wavelength of the electrons that have been accelerated from rest through a potential difference of 40 kV Given electronic charge e 1 602x10 19...
- Q 2 d A monochromatic X ray beam whose wavelength is 0 0558 nm is scattered in Compton scattering through an angle 46 Calculate the wavelength of the scattered beam Given...
- Q Let s consider the case of nitrogen atoms which have the electronic configuration 18 28 2p in the ground state a Assume for now that the electrons are distinguishable particles...
- Q 1 For the electron in d orbital the spin angular 73 momentum is 110110 2 How many orbitals are associated with 4th 1 3 3 h 22n 15 energy 74...
- Q 1 Compute the wavelengths for the Balmer series transitions in a hydrogen atom 3 2 all the way up to 8 2 Please write all answers in nanometers Must show...
- Q In accordance with Bohr s model what is the quantum number that characterizes the earth s revolution around the sun in an orbit of radius 1 5 10 1 m...
- Q An ideal gas is expanded so that the amount of heat transferred to the gas is equal to double the decrease in enthalpy Identify option s which are corre PV12...
- Q 3 2 1 4 1 414 1 The mass of a particle is 100 g and its radius is 87 2 x 10 cm If its velocity is 10 cm...
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