The rest mass of photon is

The formula of the momentum of a photon is:

The rest mass of photon is:(15)(16) Strong nuclear force exists between:A. Hadrons ⃝ B. Photons ⃝B. Leptons ⃝ D. Muons ⃝(17) The half-life of a radioactive element which has only 1 of its original mass leftafter elapsed of 60 days is:A. 30 days ⃝ B. 20 days ⃝C. 15 days ⃝ D. 12 days ⃝Page 2 of 2A.C.LargeZero⃝⃝B.D.SmallInfinite⃝⃝The peak value of A.C source is 20 A, its rms value will be:A. 14.1 A ⃝ B. 10 A ⃝C. 20 A ⃝ D. 28.2 A ⃝The materials in which disordered structure of liquid is frozen are:A. Amorphous ⃝ B. Crystalline ⃝C. Polycrystalline ⃝ D. Quartz ⃝A. Infinite ⃝ B. Zero ⃝C. 1. 6  1027 kg ⃝ D. 3  108 kg ⃝The type of spectra produced by atoms is:A. Continuous spectra ⃝ B. Band spectra ⃝C. Line spectra ⃝ D. Braking radiation spectra ⃝FBISE

Calculate the momentum (in kg · m/s) of a photon having a wavelength of 4.48 µm.

What particles have no mass?a.Electronsb.Photonsc.Neutrinosd.Gluonse.All of the abovef.None of the above

According to newton’s Law of gravitation, any two particles of the universe attract each other with a force which is proportional to the product of the masses of the particles and inversely proportional to the square of distance between them. If  and  are masses of two particles separated by distance r then force between them is given as , where G is called universal gravitational constant.According to Max Planck the light is collection of photons such that energy of each photon is  where  is frequency of the photon and h is called Planck’s constant.According to Einstein if m is mass of a particle (or sometime called dynamic mass of the particle) then its energy is given by the relation  where c is speed of light.If [G], [h] and [c] are taken as fundamental quantities then dimensions of mass is: