Question

SECTION A (OBJECTIVE TYPE) 1. The following questions are multiple choice questions. Choose the most appropriate answer In 1924, de Broglie proposed that every particle possesses the properties with a wavelength oven by X = h/mv where m is the mass of the particle, v is the velocity and h is the planck's constant. The de Broglie prediction was confirmed experimentally when it was found that an electron beam undergoes diffraction, a phenonmenon characteristic of waves. The de broglie wavelength can be estimated by measuring kinetic energy of an electron accelerating by potential as mv = Ev i. The mass of a photon moving with a velocity of light having wavelength same as that of an alpha particle moving with velocity of 2.5*102 m/s is (a) 7.92 * 10 kg (b) 5.5 * 10 kg (c) 5.65 * 10kg (d) 7.92 * 10 kg it. The proton and Hea are accerelated by the same potential, then their de-Broglie wavelengths A Hez. and Ap are in ratio of (a) 1/ 02 (b) 1/ 2v2 (c) 2V2 (d) 1/2 it. If is the wavelength associated with the electron in the fourth circular orbit of hydrogen atom, then radius of orbit is (a) N/2 n (b) (c)2/n (d) 2 1/2 iv. The wavelength of particle constituting a beam of helium atoms moving with a velocity of 2x 10° ms (a) 4.99pm (b) 49.9pm (c) 499pm (d) 499nm​

Answer 1

Answer:

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