Find the wave number of a photon having an energy of 2.072.eV. Given : Charge on electron = `1.6 xx 10^-19 C`, Velocity-of light in air = `3 xx 10^8 m//s`,Planck's constant =`6.63 xx 10^-34 J-s`.

The charge on the electron is 1.6 xx 10^(-19) C . The order of magnitude is

Calculate the value of Bohr Magneton (Given: Charge on electron = 1.6xx10^-19 C, h (Planck's) constant = 6.63xx10^-34Js, mass of electron m_e = 9.1xx10^-31 kg)

An electron is moving with a speed of 3 xx 10^7m//s in a magnetic field of 6 xx 10^-4 T perpendicular to its path. What will be the radius of the path? What will be the frequency and the energy in keV? Given: mass of electron = 9 xx 10^-31 kg , charge e = 1.6 xx 10^-19C , lev = 1.6 xx 10^-19 J .

Show that (1 kWh = 3.6 xx 10^6J ).

The absolute refractive index of water is 1.5. What is the velocity of light in water? (Velocity of light in vacuum = 3 xx 10^(8) m//s )

Observations from an experiment on photoelectric effect for the stopping potential by varying the incident frequency were plotted.The slope of the linear curve was found to be approximately 4.1 xx 10^-15 V s . Given that the charge of an electron is 1.6 xx 10^-19 C , find the value of the Planck's constant h .

Find the energy of the electron in eV in the third Bohr orbit of the hydrogen atom. ( Rydberg's constant R = 1.097 xx10^7 m^-1 Planck's constant (h) = 6.63xx10^-34 J.S , velocity of light in air (c) = 3xx 10^8 m//s)

The photoelectric threshold wavelength of a metal is 230 nm. Determine the maximum kinetic energy in joule and eV of the ejected electron from metal surface when it is exposed to a radiation of wavelength 180 nm. (Planck's constant h = 6.63 xx 10^-34 J-S, C = 3 xx 10^8 m//sec .)

Observations from an experiment on photoelectric effect for the stopping potential by varying the incident frequency were plotted. The slope of the linear curve was found to be approximately 4.1 xx 10^-15 V s . Given that the charge of an electron is 1.6 xx 10^-19 C , find the value of the Planck's constant h.