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What is the wavelength of a photon of energy 2 eV?

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Important Questions on Structure of Atom

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 49
One photon is absorbed per gaseous molecule of X2 for converting it into X atoms. If light absorbed has a wavelength 1240 A∘, then the bond energy of X2 is
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 50
The work function of a metal is 4 eV. To eject a photoelectron of zero velocity from the surface of the metal, the wavelength of incident light should be approximately
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 51
The minimum energy required to remove an electron from a metal X is 3.31×10-20 J. The wavelength of light that can not eject a photoelectron from metal X is
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 52
Light of wavelength λ falls on a metal having work function hcλ∘. The photoelectric effect takes place when
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 53
Cu metal (work function=4.8 eV) can show photoelectric effect when the wavelength of the photon is
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 54
What is the maximum kinetic energy of photoelectron from a photon of wavelength 2000 A∘ of Cu metal (work function of Cu is 4.8 eV)?
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 55
When the frequency of light incident on a metallic plate is doubled, the maximum KE of the emitted photoelectrons is
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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 56
The number of photoelectrons emitted depends upon