22. The work function of a metal is 6.4x10-¹9 J. a) Explain what is meant by the term 'work function'. 2 b) Light with a frequency of 1.2x10¹5 Hz is shone onto the metal surface Find whether or not the photons of this light will cause the photoelectric 2 effect to take place. (h=6.62x10-34 Js) c) The light source is now replaced with a light source of frequency 1.5x10¹5 Hz. i) Write down Einstein's photoelectric equation. ii) The photons from the source contain more energy then is required to release the electrons. How much extra energy is available after the electron has been released ? iii) Photons come from three lamps that emit red, green and blue light Which of these lamps produces photons with the highest energy OR
22. The work function of a metal is 6.4x10-¹9 J. a) Explain what is meant by the term 'work function'. 2 b) Light with a frequency of 1.2x10¹5 Hz is shone onto the metal surface Find whether or not the photons of this light will cause the photoelectric 2 effect to take place. (h=6.62x10-34 Js) c) The light source is now replaced with a light source of frequency 1.5x10¹5 Hz. i) Write down Einstein's photoelectric equation. ii) The photons from the source contain more energy then is required to release the electrons. How much extra energy is available after the electron has been released ? iii) Photons come from three lamps that emit red, green and blue light Which of these lamps produces photons with the highest energy OR
22. The work function of a metal is 6.4x10-¹9 J. a) Explain what is meant by the term 'work function'. 2 b) Light with a frequency of 1.2x10¹5 Hz is shone onto the metal surface Find whether or not the photons of this light will cause the photoelectric 2 effect to take place. (h=6.62x10-34 Js) c) The light source is now replaced with a light source of frequency 1.5x10¹5 Hz. i) Write down Einstein's photoelectric equation. ii) The photons from the source contain more energy then is required to release the electrons. How much extra energy is available after the electron has been released ? iii) Photons come from three lamps that emit red, green and blue light Which of these lamps produces photons with the highest energy OR
The work function of a metal is 6.4x10^-19 J. Explain what is meant by the term 'work function. b) Light with a frequency of 1.2x10 Hz is shone onto the metal surface. Find whether or not the photons of this light will cause the photoelectric effect to take place. (h-6.62x10 J s) c) The light source is now replaced with a light source of frequency 1.5x105 Hz. i) Write down Einstein's photoelectric equation i) The photons from the source contain more energy then is required to release the electrons. How much extra energy is available after the electron has been released? iii) Photons come from three lamps that emit red, green and blue light. Which of these lamps produces photons with the highest energy?
Transcribed Image Text:22. The work function of a metal is 6.4x10-1⁹ J.
a) Explain what is meant by the term 'work function'.
2
b) Light with a frequency of 1.2x10¹5 Hz is shone onto the metal surface
Find whether or not the photons of this light will cause the photoelectric
2
effect to take place. (h-6.62x10-34 Js)
c) The light source is now replaced with a light source of frequency
1.5x10¹5 Hz.
i) Write down Einstein's photoelectric equation.
ii) The photons from the source contain more energy then is required to
release the electrons. How much extra energy is available after the
electron has been released ?
iii) Photons come from three lamps that emit red, green and blue light
Which of these lamps produces photons with the highest energy?
OR
Definition Definition Phenomenon in which a substance absorbs electromagnetic radiation and electrically charged particles are emitted from or inside it.
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