EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 30 - Dual Nature of Matter and Radiation>KCET (UG) 2021>Q 8

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According to Einstein's photoelectric equation, the graph between kinetic energy of photoelectrons ejected and the frequency of incident radiation is

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Important Questions on Dual Nature of Matter and Radiation

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 30 - Dual Nature of Matter and Radiation>KCET (UG) 2020>Q 9

The de-Broglie wavelength associated with electron of hydrogen atom in the ground state is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 30 - Dual Nature of Matter and Radiation>KCET (UG) 2019>Q 10

An electron is moving with an initial velocity

\vec{V} = V_{0} \hat{i}

and is in a uniform magnetic field

\vec{B} = B_{0} \hat{j}

. Then its de Broglie wavelength

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 30 - Dual Nature of Matter and Radiation>KCET (UG) 2018>Q 11

A proton and an

α

particle are accelerated through the same potential difference

V

. The ratio of their respective de-Broglie's wavelengths is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 30 - Dual Nature of Matter and Radiation>KCET (UG) 2021>Q 12

The figure shows standing de Broglie waves due to the revolution of electron in a certain orbit of hydrogen atom. Then the expression for the orbit radius is (all notations have their usual meanings)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 30 - Dual Nature of Matter and Radiation>KCET (UG) 2021>Q 13

An electron in an excited state of

{Li}^{2 +}

ion has angular momentum

\frac{3 h}{2 π}

. The de Broglie wavelength of electron in this state is

P π a_{0}

(where

a_{0} = Bohr

radius). The value of

P

is