Physics

Problem

If the deBroglie wavelength of an electron is equal to

10^{-3}

times the wavelength of a photon of frequency

6 \times 10^{14}

Hz, then the speed of electron is equal to : (Speed of light

= 3 \times 10^8

m/s) Planck's constant

= 6.63 \times 10^{-34}

J.s Mass of electron

= 9.1 \times 10^{-31}

kg) [Main 11 Jan. 2019 (I)] (a)

1.1 \times 10^6

m/s (b)

1.7 \times 10^6

m/s (c)

1.8 \times 10^6

m/s (d)

1.45 \times 10^6

m/s