EASY
JEE Advanced
IMPORTANT
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Einstein got Nobel prize on which of the following works?

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Important Questions on Modern Physics

EASY
JEE Advanced
IMPORTANT
The work function of a metal is 4.2 eV, its threshold wavelength will be
EASY
JEE Advanced
IMPORTANT
The number of photoelectrons emitted per second from a metal surface increases when
MEDIUM
JEE Advanced
IMPORTANT
The work function of a metal is 1 eV. Light of wavelength 3000 Å is incident on this metal surface. The velocity of emitted photoelectrons will be
EASY
JEE Advanced
IMPORTANT
The work function of a metal is 1.6×10-19 J. When the metal surface is illuminated by the light of wavelength 6400 Å, then the maximum kinetic energy of emitted photoelectrons will be (Given, Planck's constant, h=6.4×10-34 J-s)
EASY
JEE Advanced
IMPORTANT
The work function for tungsten and sodium are 4.5 eV and 2.3 eV, respectively. If the threshold wavelength λ for sodium is 5600 Å, the value of λ for tungsten is
EASY
JEE Advanced
IMPORTANT
Photoelectric effect was successfully explained first by
EASY
JEE Advanced
IMPORTANT
In a photoelectric experiment for 4000 Å incident radiation, the potential difference to stop the ejection is 2 V. If the incident light is changed to 3000 Å, then the potential required to stop the ejection of electrons will be
EASY
JEE Advanced
IMPORTANT
The maximum wavelength of radiation that can produce photoelectric effect in a certain metal is 200 nm. The maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm will be