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6 solutions

Photoelectric Effect

Q. A silicon (Φ = 7.77 × 10-19 J) surface is irradiated with UV radiation with a wavelength of 225 nm. Assume an electron was a mass of 9.11 x 10-31 kg. What is the frequency of the incident radiation? What is the kinetic energy of the emitted electrons? What is the speed of the emitted electrons? What is the wavelength of the emitted electrons?

Solved • Jul 3, 2019

Photoelectric Effect

Q. The minimum energy needed to remove an electron from potassium metal is 3.7 × 10–19 J. Will photons of frequencies 4.3 × 10 14 Hz (red light) and 7.5 × 10 14 Hz (blue light) trigger the photoelectric effect?

Solved • May 14, 2019

Photoelectric Effect

Q. How does the particle theory explain the photoelectric effect while the wave theory does not?

Solved • May 14, 2019

Photoelectric Effect

Q. A metal with a threshold frequency of 1.33×1015 s−1 emits an electron with a velocity of 6.45×105 m/s when radiation of 1.59×1015 s−1 strikes the metal.Calculate the mass of the electron.

Solved • May 9, 2019

Photoelectric Effect

Q. Find the velocity of an electron emitted by a metal whose threshold frequency is 2.21×1014 s−1 when it is exposed to visible light of wavelength 4.76×10−7 m .

Solved • May 9, 2019

Photoelectric Effect

Q. What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.7×1015Hz?

Solved • Dec 16, 2017