Electrons are ejected from a metallic surface with speeds ranging up to 3.90x10^5 m/s when light...

Question

Question

Electrons are ejected from a metallic surface with speeds ranging up to 3.90x10^5 m/s when light with a wavelength of λ= 705 nm is used.

1.Find the work function of the surface in units of eV.

(A) 1.33 (B) 2.67 (C) 3.86 (D) 4.38 (E) 5.38

2.Find the cutoff frequency for this surface (in units of 10^14 Hz).

(A) 1.33 (B) 2.67 (C) 3.21 (D) 4.38 (E) 5.38

science physics

Answer 1

Answer #1

Answer 2

Similar Homework Help Questions

Electrons are ejected from a metallic surface with speeds ranging up to 4.4 105 m/s when...

Electrons are ejected from a metallic surface with speeds ranging up to 4.4 105 m/s when light with a wavelength of λ = 630 nm is used. (a) What is the work function of the surface? ______eV (b) What is the cutoff frequency for this surface? _________Hz
1. Electrons are ejected from a metal surface with energies ranging up to 0.5 eV when...

1. Electrons are ejected from a metal surface with energies ranging up to 0.5 eV when light with a wavelength of 538 nm is used. What is the work function of the metal in units of eV? 2. What is the deBroglie wavelength (in nm) of a neutron (m = 1.67*10-27 kg) moving with a speed of 68 m/s? Enter a number with 2 decimal places. 3. A gamma ray photon has an energy of 0.84 GeV. (1 GeV =...
When sodium is illuminated with light of wavelength 420 nm, the electrons are ejected with 0.65...

When sodium is illuminated with light of wavelength 420 nm, the electrons are ejected with 0.65 eV of energy. When illuminated with light of wavelength 310 nm, the electrons are ejected with 1.71 eV of energy. (a) Use these data to find the work function of sodium. Find a percent difference between this and the accepted value of 2.28 eV. (b) What is the threshold frequency of sodium? (c) If we illuminated sodium with light of wavelength 150 nm, what...

Ultraviolet light having a wavelength of 113 nm strikes a metallic surface. Electrons leave the surface...

Ultraviolet light having a wavelength of 113 nm strikes a metallic surface. Electrons leave the surface with speeds up to 3.06 × 105 m/s. What is the work function, in eV of the metal?
Ultraviolet light having a wavelength of 146 nm strikes a metallic surface. Electrons leave the surface...

Ultraviolet light having a wavelength of 146 nm strikes a metallic surface. Electrons leave the surface with speeds up to 3.15 × 105 m/s. What is the work function, in eV of the metal?
Electromagnetic radiation is incident on a metallic surface. Electrons are emitted from the surface when the...

Electromagnetic radiation is incident on a metallic surface. Electrons are emitted from the surface when the wavelength is 450 nm or less. a) What is the work function of the metal? b) What is the maximum kinetic energy of photo-electrons if the incident light has a wavelength of 400 nm? c) What is the stopping voltage required to stop photo-electrons ejected by the plate when the incident light has a wavelength of 300 nm? d)If the stopping voltage is 5...

When 289-nm photons are incident on the surface of a metal, electrons are ejected from it...

When 289-nm photons are incident on the surface of a metal, electrons are ejected from it and the stopping potential is 2.69 V. Find the energy of incident photons: E,= (4.287 eV. Find the kinetic energy of ejected electrons: K= eV. Find the work function of the metal: p= 1.597 ✓ev. Find the wavelength of the least energetic photon that can induce the photo- electric effect in this metal 2 = 778 nm.
6. Light with a frequency of 1.75 x 1015 Hz ejects electrons from the surface of...

6. Light with a frequency of 1.75 x 1015 Hz ejects electrons from the surface of lead, which has a work function of 4.25 eV. What is the minimum de Broglie wavelength of the ejected electrons? nm
6. Light with a frequency of 2.47 x 1015 Hz ejects electrons from the surface of...

6. Light with a frequency of 2.47 x 1015 Hz ejects electrons from the surface of calcium, which has a work function of 2.87 eV. What is the minimum de Broglie wavelength of the ejected electrons? 4.52e-10 nm

6. Light with a frequency of 2.47 x 1015 Hz ejects electrons from the surface of...

6. Light with a frequency of 2.47 x 1015 Hz ejects electrons from the surface of calcium, which has a work function of 2.87 eV. What is the minimum de Broglie wavelength of the ejected electrons? 4.52e-10 nm