a light of wavelength lambda and intensity i is incident

A light of wavelength $$\lambda $$ and intensity $$I$$ is incident normally on the surface. If reflection coefficient of surface is $$r,$$ the pressure exerted by light on the surface is equal to

A. $$\frac{{2I}}{c}$$

B. $$\frac{I}{c}r$$

C. $$\frac{I}{c}\left( {1 + r} \right)$$

D. $$\frac{I}{c}\left( {1 - r} \right)$$

Answer : $$\frac{I}{c}\left( {1 + r} \right)$$

Solution :
$$\eqalign{ & F = \frac{{dP}}{{dt}} = \left( {\frac{{IA}}{{\frac{{hc}}{\lambda }}}} \right)\left( {1 + r} \right)\frac{h}{\lambda } \cr & \Rightarrow P = \frac{F}{A} = \frac{I}{c}\left( {1 + r} \right) \cr} $$

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Modern Physics >> Dual Nature of Matter and Radiation

Releted Question 1

A particle of mass $$M$$ at rest decays into two particles of masses $${m_1}$$ and $${m_2},$$ having non-zero velocities. The ratio of the de Broglie wavelengths of the particles, $$\frac{{{\lambda _1}}}{{{\lambda _2}}},$$ is

A. $$\frac{{{m_1}}}{{{m_2}}}$$

B. $$\frac{{{m_2}}}{{{m_1}}}$$

C. 1.0

D. $$\frac{{\sqrt {{m_2}} }}{{\sqrt {{m_1}} }}$$

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Releted Question 2

A proton has kinetic energy $$E = 100\,keV$$ which is equal to that of a photon. The wavelength of photon is $${\lambda _2}$$ and that of proton is $${\lambda _1}.$$ The ration of $$\frac{{{\lambda _2}}}{{{\lambda _1}}}$$ is proportional to

A. $${E^2}$$

B. $${E^{\frac{1}{2}}}$$

C. $${E^{ - 1}}$$

D. $${E^{ - \frac{1}{2}}}$$

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Releted Question 3

A beam of electron is used in an YDSE experiment. The slit width is $$d.$$ When the velocity of electron is increased, then

A. no interference is observed

B. fringe width increases

C. fringe width decreases

D. fringe width remains same

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Releted Question 4

Formation of covalent bonds in compounds exhibits

A. wave nature of electron

B. particle nature of electron

C. both wave and particle nature of electron

D. none of these

View Answer

A light of wavelength $$\lambda $$ and intensity $$I$$ is incident normally on the surface. If reflection coefficient of surface is $$r,$$ the pressure exerted by light on the surface is equal to

Releted MCQ Question on
Modern Physics >> Dual Nature of Matter and Radiation

A particle of mass $$M$$ at rest decays into two particles of masses $${m_1}$$ and $${m_2},$$ having non-zero velocities. The ratio of the de Broglie wavelengths of the particles, $$\frac{{{\lambda _1}}}{{{\lambda _2}}},$$ is

A proton has kinetic energy $$E = 100\,keV$$ which is equal to that of a photon. The wavelength of photon is $${\lambda _2}$$ and that of proton is $${\lambda _1}.$$ The ration of $$\frac{{{\lambda _2}}}{{{\lambda _1}}}$$ is proportional to

A beam of electron is used in an YDSE experiment. The slit width is $$d.$$ When the velocity of electron is increased, then

Formation of covalent bonds in compounds exhibits

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Dual Nature of Matter and Radiation

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A light of wavelength $$\lambda $$ and intensity $$I$$ is incident normally on the surface. If reflection coefficient of surface is $$r,$$ the pressure exerted by light on the surface is equal to

Releted MCQ Question on Modern Physics >> Dual Nature of Matter and Radiation

A particle of mass $$M$$ at rest decays into two particles of masses $${m_1}$$ and $${m_2},$$ having non-zero velocities. The ratio of the de Broglie wavelengths of the particles, $$\frac{{{\lambda _1}}}{{{\lambda _2}}},$$ is

A proton has kinetic energy $$E = 100\,keV$$ which is equal to that of a photon. The wavelength of photon is $${\lambda _2}$$ and that of proton is $${\lambda _1}.$$ The ration of $$\frac{{{\lambda _2}}}{{{\lambda _1}}}$$ is proportional to

A beam of electron is used in an YDSE experiment. The slit width is $$d.$$ When the velocity of electron is increased, then

Formation of covalent bonds in compounds exhibits

Practice More Releted MCQ Question on Dual Nature of Matter and Radiation

Practice More MCQ Question on Physics Section

Releted MCQ Question on
Modern Physics >> Dual Nature of Matter and Radiation

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Dual Nature of Matter and Radiation