EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET Medical 2019 (8-May Shift-2)>Q 2

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A potassium chloride crystal has an energy band gap of $6 eV$ . What wavelength of light for which the crystal is completely transparent? (Assume $h c = 1242 eV mm$ )

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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 26 - Dual Nature of Matter and Radiation>TS EAMCET 2020 (28-Sep Shift-1)>Q 3

In the experimental study of photoelectric effect, if

V_{0}

is the stopping potential and

v

is the frequency of the incident light on the metal the slope of graph plotted for

V_{0}

Versus

v

is (where

h, e

and

ϕ_{0}

are Planck's constant, charge of electron and work function of the metal respectively.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET Medical 2018 (02 May Shift-1)>Q 4

1 μ W

of light at

600 nm

falls on a metal whose work function is

2 eV

. The maximum number of electrons that can come out of the metal is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET - 10 August 2021 Shift 1>Q 5

In a photoelectic experiment the incident photons have frequency

\frac{3}{2} v,

where

v

is the threshold frequency. The stopping potential is

V .

If the frequency of the incident photons is changed to

\frac{3}{4} v,

then the correct statement is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET Medical 2018 (02 May Shift-1)>Q 6

A stream of electrons accelerated by a potential difference

V

falls on the surface of a metal whose inner potential is

V_{i} = 15 V

. Then the refractive index of the metal for the electrons accelerated by a potential difference of

V = 150 V

is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET Medical 2021 (9-Aug Shift-1)>Q 7

An electron is moving with a speed in a constant magnetic field, it's de-Broglie wavelength (Assume magnetic field is perpendicular to the plane of motion of electron)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET - 9 August 2021 Shift 2>Q 8

An electron accelerated by a potential difference of

V

posses a de-Broglie wavelength,

λ

. If the accelerating potential is increased by a factor,

9

. The de-Broglie wavelength of electron will be approximately