A photon has a wavelength of 3.5Å. Calculate its mass (Plank's constant, = `6.626 xx 10^(-34)` Js . Velocity of light = `3 xx 10^(8) ms^(-1)`)

The dual behaviour of matter was proposed by the French physicist , de Broglie. b) A moving electron has a de Broglie wavelength of 7 xx10^ (-7) m. Calculate its kinetic energy. (Plank's constant, = 6.626 xx 10^(-34) Js),( Mass of an electron = 9.1 xx 10^(-31) kg.)

The dual behaviour of matter was proposed by the French physicist, de-Brogile. A moving electron has a de-Brogile wavelength of 7.2xx10^-7 m. Calculate its kinetic energy. [Planck's constant = 6.626xx10^-34 Js, Mass of a electron = 9.1xx10^-31 kg )

Calculate the number of significant figures in the following values. a. Planck's constant '=6.626 xx 10^(34) Js' b. Avogadro number '=6.023 xx 10^(23)' c. Velocity of light '=3.0 xx 10^8 ms^(-1)' d. Electronic charge '=1.602 xx 10^(-19) C'

The dual behaviour of matter was proposed by the French physicist, de Broglie. A moving electron has a de Broglie wavelengh 7xx10^(-7)m Calculate its kinetic energy. (Planck’s constant =6.626xx10^(-34)Js Mass of an electron 9.1xx10^(-31)kg )

An electron is moving with a velocity of 2.5 xx 10^(6) ms^(-1) . If the uncertainty in its velocity is 0.1% , calculate the uncertainty in its position. (Plank's constant, h = 6.626 xx 10^(-34) Js),( Mass of the electron = 9.1 xx 10^(-31) kg.)

The photon has a momentum as well as a wavelength . A photon has a mass of 8.6 xx 10^(-30) kg. Calculate the wavelength. [Plank's constant, h = 6.626 xx 10^(-34) Js]

The photon has a momentum as well as a wavelength. A photon has a mass of 8.5xx10^-30 kg . Calculate the wavelength.[Planck's constant, h=6.626xx10^-34 Js ]