Q- A pulsed laser fires a 1000-MW pulse horizontally at a 10mg mass suspended vertically from a 4 cm long fiber of negligible mass. If the pulse lasts duration of 200 nanoseconds, and the radiation is completely absorbed by the mass, by what maximum angle is the pendulum deflected?
Q- The normal hydrogen atom consists of a proton nucleus and an orbital electron. Assume that the electron orbit is circular and that the constant distance between the proton and electron is 5.3 x 10-11 m.
(a) What is the force of attraction between the two fundamental particles?
(b) What is the o…
Q- The threshold wavelength for emission of electrons from a given surface is 320nm.
a) What will be the maximum kinetic energy of ejected electrons when the wavelength of the incident light is changed to 350nm.
b) What will be the maximum kinetic energy of ejected electrons when the wavelength of…
Q- The tenth brightest member of the cluster of galaxies known as 'Abell1185' has a brightness of 2.70*1010 Wm-2. A line in its spectrum at a wavelength of 503.1 nm is identified as being a member of the Balmer series that has a rest wavelength of 486.1 nm. Consider the luminosity of the tenth brigh…
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