Physics: Quantum

Wave -particle duality is supported by...

• electrons behaving as particles with ordinary matter

• electrons behaving as waves when travelling through space

• the photo electric effect

• all of the above

A discrete amount of energy of electromagnetic radiation is called

• Wave

• Photon

• Planck's Constant

• Quantum

Light is ejected from the surface of a metal when light of sufficient energy is incident on it. This phenomenon is known as?

• Photo-electric effect

• Photon absorption emission

• Emission of light

• Wave particle duality

Theoretically, Photon energy of light is the sum of Work function of a metal and________

• Maximum potential energy of electrons due to height reached after emission

• Minimum kinetic energy of electrons emitted

• Maximum kinetic energy of emitted electrons.

• Maximum workdone in ejecting the electron and the electron de-exciting

The X-intercept of an Ek_max against frequency graph is?

• Planck's Constant

• Work function

• Wavelength

• Threshold frequency

The y-ntercept of an Ek_max against frequency graph is?

• Work function

• Planck's Constant

• Threshold wavelength

• Threshold frequency

For photo electric effect, the gradient of a Velocity against frequency graph is?

• 2h

• 2h/f

• 2h/f_o

• 2h/m

Photo electric effect will occur if and only if

• Frequency of light is greater than threshold frequency

• Frequency of light is equal to threshold wavelength

• Wavelength of light is extremely long

• Wavelength of light is equal to the atomic spacing of the metal

The Planck's Constant relates

• Energy with frequency

• Speed of light with energy

• Frequency with the speed of light.

• Wavelength with energy

The gradient of an Ek_max against frequency graph is?

• Threshold frequency

• Planck's Constant

• Wavelength

• Work function