Physics Ch 8 Class 12 Dawn of Modern Physics


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Planck’s constant is analogous to:

PMC Practice 6
Physics
Dawn of Modern Physics
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In Heisenberg Principle:

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Name the scientist who won the noble prize for discovery of energy quanta

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An electron moving with velocity v has momentum 3 x 10 -26 Kg.m/s. The de Broglie wavelength associated with it is ______. Value of h = 6.63 x 10-34 is.

NTS 2019
Physics
Dawn of Modern Physics
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Heisenberg uncertainty principle states:

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Who was awarded Nobel Prize (1921) for explanation of Photoelectric Effect?

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Compton shift is maximum at:

PMC 2021 Tested
Physics
Dawn of Modern Physics
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The stopping potential depends on

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Which of following has greatest energy

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Einstein was given a Nobel prize for:

PMC 2021 Tested
Physics
Dawn of Modern Physics
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If Compton shift is half of Compton wavelength, then the scattering angle would be:

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Which of the following Is correct?

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Calculate the energy of a photon, with a frequency of 3.0 x 1018 Hz.
(h = 6.63 x 10-34)

UHS 2019
Physics
Dawn of Modern Physics
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What will be the energy of an X-ray quantum of wave length 1.0 x 10-10 m?

NTS 2016 SMBBMC
Physics
Dawn of Modern Physics
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White light gives spectrum after undergoing:

PMC Sample 2
Physics
Dawn of Modern Physics
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Value of Wien’s constant is?

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Anti matter theory was proposed by: a) Einstein b) Bohr

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Which statement is universally correct?

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Presence of Photon was confirmed by

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Plank׳s constant is analogus to:

PMC Sample 3
Physics
Dawn of Modern Physics
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Sunlight will emit photo electrons when striking which of the following

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Who was awarded Nobel Prize (1921) for explanation of Photoelectric Effect?

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Fluorescence is produced when cathode rays strike on:

PMC 2021 Tested
Physics
Dawn of Modern Physics
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The series limit for the Balmer series of hydrogen spectrum occurs at 3664 A. Calculate Ionization energy of hydrogen atom.

NTS 2013
Chemistry
Dawn of Modern Physics
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Minimum frequency below which no electrons are emitted from the metal surface is called ______ frequency.

NTS 2016 DUHS & JSMU
Physics
Dawn of Modern Physics
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theory of was Relativity proposed by

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X-rays are used to investigate:

PMC Sample 3
Physics
Dawn of Modern Physics
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) Twin paradox Is consequence of?

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When an observer moves with velocity of light, relative to a timing device at rest, he would notice:

NUMS 2015
Physics
Dawn of Modern Physics
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The uncertainty in momentum and position is due to its:

PMC Sample 1
Physics
Dawn of Modern Physics
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The absolute standard of rest is:

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The electron shows purely a ____ when free.

PMC Sample 2
Physics
Dawn of Modern Physics
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A Black body is?

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In Einstein’s theory, the deflection of light is predicted to be exactly as great as it is according to Newton’s theory

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What would be Compton Wave shift if X-rays are scattered at an angle of 90 degree?

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The phenomena in which certain metals emit electrons when exposed to high-frequency light is known as?

NTS 2014
Physics
Dawn of Modern Physics
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