Einstein s Photo Electric Equation and Energy Quantity Of Radiation (KE, Vmax, Work Function)
« Previous Topic: Electron Emission, Photo Electric Effect (Threshol Frequency Stopping Potential) Next Topic: Photo Cell »
Dual nature of radiation and Matter

142218 Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $2: 1$
3 $1: 4$
4 $4: 1$
UP CPMT-2009
Dual nature of radiation and Matter

142219 Which of the following is incorrect about photon?

1 Its rest mass is 0 .
2 Its energy is $h v$.
3 Its momentum is $\frac{h v}{\mathrm{c}}$
4 It does not exert pressure.
COMEDK 2019
Dual nature of radiation and Matter

142222 When photons of energy hv fall on metal plate of work function ' $\mathbf{W}_{0}$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

1 $2 \mathrm{~K}$
2 $\mathrm{K}$
3 $\mathrm{K}+\mathrm{W}_{0}$
4 $\mathrm{K}+\mathrm{hv}$
MHT-CET 2019
Dual nature of radiation and Matter

142224 Sodium and copper have work function $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $4: 1$
3 $2: 1$
4 $1: 4$
AIIMS-26.05.2019(E) Shift-2
Dual nature of radiation and Matter

142225 Photons of energy $2 \mathrm{eV}$ and $2.5 \mathrm{eV}$ successively illuminate a metal whose work function is 0.5 $\mathrm{eV}$. The ratio of maximum speed of emitted electron is

1 $\sqrt{3}: 2$
2 $2: 1$
3 $1: 2$
4 $2: \sqrt{3}$
GUJCET 2019
Join With Us for More Updates
Dual nature of radiation and Matter

142218 Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $2: 1$
3 $1: 4$
4 $4: 1$
UP CPMT-2009
Dual nature of radiation and Matter

142219 Which of the following is incorrect about photon?

1 Its rest mass is 0 .
2 Its energy is $h v$.
3 Its momentum is $\frac{h v}{\mathrm{c}}$
4 It does not exert pressure.
COMEDK 2019
Dual nature of radiation and Matter

142222 When photons of energy hv fall on metal plate of work function ' $\mathbf{W}_{0}$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

1 $2 \mathrm{~K}$
2 $\mathrm{K}$
3 $\mathrm{K}+\mathrm{W}_{0}$
4 $\mathrm{K}+\mathrm{hv}$
MHT-CET 2019
Dual nature of radiation and Matter

142224 Sodium and copper have work function $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $4: 1$
3 $2: 1$
4 $1: 4$
AIIMS-26.05.2019(E) Shift-2
Dual nature of radiation and Matter

142225 Photons of energy $2 \mathrm{eV}$ and $2.5 \mathrm{eV}$ successively illuminate a metal whose work function is 0.5 $\mathrm{eV}$. The ratio of maximum speed of emitted electron is

1 $\sqrt{3}: 2$
2 $2: 1$
3 $1: 2$
4 $2: \sqrt{3}$
GUJCET 2019
For More Updates join with Us
Dual nature of radiation and Matter

142218 Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $2: 1$
3 $1: 4$
4 $4: 1$
UP CPMT-2009
Dual nature of radiation and Matter

142219 Which of the following is incorrect about photon?

1 Its rest mass is 0 .
2 Its energy is $h v$.
3 Its momentum is $\frac{h v}{\mathrm{c}}$
4 It does not exert pressure.
COMEDK 2019
Dual nature of radiation and Matter

142222 When photons of energy hv fall on metal plate of work function ' $\mathbf{W}_{0}$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

1 $2 \mathrm{~K}$
2 $\mathrm{K}$
3 $\mathrm{K}+\mathrm{W}_{0}$
4 $\mathrm{K}+\mathrm{hv}$
MHT-CET 2019
Dual nature of radiation and Matter

142224 Sodium and copper have work function $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $4: 1$
3 $2: 1$
4 $1: 4$
AIIMS-26.05.2019(E) Shift-2
Dual nature of radiation and Matter

142225 Photons of energy $2 \mathrm{eV}$ and $2.5 \mathrm{eV}$ successively illuminate a metal whose work function is 0.5 $\mathrm{eV}$. The ratio of maximum speed of emitted electron is

1 $\sqrt{3}: 2$
2 $2: 1$
3 $1: 2$
4 $2: \sqrt{3}$
GUJCET 2019
NEET DIGITAL LIBRARY
Dual nature of radiation and Matter

142218 Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $2: 1$
3 $1: 4$
4 $4: 1$
UP CPMT-2009
Dual nature of radiation and Matter

142219 Which of the following is incorrect about photon?

1 Its rest mass is 0 .
2 Its energy is $h v$.
3 Its momentum is $\frac{h v}{\mathrm{c}}$
4 It does not exert pressure.
COMEDK 2019
Dual nature of radiation and Matter

142222 When photons of energy hv fall on metal plate of work function ' $\mathbf{W}_{0}$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

1 $2 \mathrm{~K}$
2 $\mathrm{K}$
3 $\mathrm{K}+\mathrm{W}_{0}$
4 $\mathrm{K}+\mathrm{hv}$
MHT-CET 2019
Dual nature of radiation and Matter

142224 Sodium and copper have work function $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $4: 1$
3 $2: 1$
4 $1: 4$
AIIMS-26.05.2019(E) Shift-2
Dual nature of radiation and Matter

142225 Photons of energy $2 \mathrm{eV}$ and $2.5 \mathrm{eV}$ successively illuminate a metal whose work function is 0.5 $\mathrm{eV}$. The ratio of maximum speed of emitted electron is

1 $\sqrt{3}: 2$
2 $2: 1$
3 $1: 2$
4 $2: \sqrt{3}$
GUJCET 2019
Join With Us for More Updates
Dual nature of radiation and Matter

142218 Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $2: 1$
3 $1: 4$
4 $4: 1$
UP CPMT-2009
Dual nature of radiation and Matter

142219 Which of the following is incorrect about photon?

1 Its rest mass is 0 .
2 Its energy is $h v$.
3 Its momentum is $\frac{h v}{\mathrm{c}}$
4 It does not exert pressure.
COMEDK 2019
Dual nature of radiation and Matter

142222 When photons of energy hv fall on metal plate of work function ' $\mathbf{W}_{0}$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

1 $2 \mathrm{~K}$
2 $\mathrm{K}$
3 $\mathrm{K}+\mathrm{W}_{0}$
4 $\mathrm{K}+\mathrm{hv}$
MHT-CET 2019
Dual nature of radiation and Matter

142224 Sodium and copper have work function $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then ratio of their threshold wavelengths is nearest to

1 $1: 2$
2 $4: 1$
3 $2: 1$
4 $1: 4$
AIIMS-26.05.2019(E) Shift-2
Dual nature of radiation and Matter

142225 Photons of energy $2 \mathrm{eV}$ and $2.5 \mathrm{eV}$ successively illuminate a metal whose work function is 0.5 $\mathrm{eV}$. The ratio of maximum speed of emitted electron is

1 $\sqrt{3}: 2$
2 $2: 1$
3 $1: 2$
4 $2: \sqrt{3}$
GUJCET 2019