quantum

Question 1

photon

Answer 1

discrete packet of energy of em radiation

energy of one photon is directly proportional to the frequency of em radiation

Question 2

work function

Answer 2

minimum energy required to remove the least-tightly bounded electron from the surface of the metal

Question 3

threshold frequency

Answer 3

minimum frequency of em radiation for electrons to be emitted from metal surface

Question 4

absorption line spectra

Answer 4

continuous spectrum crossed by dark lines

Question 5

emission line spectra

Answer 5

discrete bright lines of different colours on a dark background

Question 6

de Broglie wavelength

Answer 6

wavelength of the matter wave that is associated with a particle that is moving

Question 7

stopping potential

Answer 7

minimum potential difference between the emitting metal and collector that
prevents the most energetic photoelectrons from reaching the collector plate
resulting in zero photoelectric current