Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 58

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According to de-Broglie's, wavelength of electron in second orbit is $10^{- 9} m$ . Then, the circumference of the orbit is

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Important Questions on Dual Nature of Matter and Radiation

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 59

If the mass of microscopic particle as well as its speed are halved, the de Broglie wavelength associated with the particle will

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 60

An electron and proton are accelerated through same potential. Then, the ratio of the wavelengths associated with the electron and proton,

\frac{λ_{e}}{λ_{p}}

will be

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 61

An electron, a proton and an alpha particle have same kinetic energy. The corresponding de-Broglie's wavelength would have the following relationship,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 62

What is the de Broglie wavelength of an electron with a kinetic energy of

120 eV

?
(Given :

h = 6.63 \times 10 J s^{- 1}

,

m_{e} = 9.11 \times 10^{- 31} kg

and

e = 1.6 \times 10^{- 19} C

)

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 63

If

λ_{p} and λ_{α}

be the wavelengths of protons and

α

-particles of equal kinetic energies, then,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Previous Year Questions)>Q 1

Radiation of energy

E

falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (

c

= Velocity of light)

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Previous Year Questions)>Q 2

The intensity of solar radiation on earth is

450 W m^{- 2}

. Assuming earth to be a perfect black body, find out the radiation pressure on earth.

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Previous Year Questions)>Q 4

A photocell employs photoelectric effect to convert