357816 The difference between threshold wavelengths for two metal surfaces \(A\) and \(B\) having work function \({\phi _A} = 9eV\) and \({\phi _B} = 4.5eV\) in \(nm\) is Given, \(hc = 1242eVnm\)

357817 The work function of a substance is 4 \({\rm{ }}eV\). The longest wavelength of light that can cause photoelectron emission from this substance is approximately

357818 The threshold wavelength for photoelectric emission from a material is \(5500\) \( \mathop A^{~~\circ} \) . Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a
A. \(75 W\) infra-red lamp
B. \(10 W\) infra-red lamp
C. \(75 W\) ultra-violet lamp
D. 10W ultra-violet lamp
Choose the correct answer from the options given below.

357819 \(A\) and \(B\) are two metals with threshold frequencies \(1.8 \times {10^{14}}\;Hz\) and \(2.2 \times {10^{14}}\;Hz\).
Two identical photons of energy \(0.825\,eV\) each are incident on them. Then photoelectrons are emitted in
\(({\rm{Take}}\,h = 6.6 \times {10^{ - 34}}Js)\)

357816 The difference between threshold wavelengths for two metal surfaces \(A\) and \(B\) having work function \({\phi _A} = 9eV\) and \({\phi _B} = 4.5eV\) in \(nm\) is Given, \(hc = 1242eVnm\)

357817 The work function of a substance is 4 \({\rm{ }}eV\). The longest wavelength of light that can cause photoelectron emission from this substance is approximately

357818 The threshold wavelength for photoelectric emission from a material is \(5500\) \( \mathop A^{~~\circ} \) . Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a
A. \(75 W\) infra-red lamp
B. \(10 W\) infra-red lamp
C. \(75 W\) ultra-violet lamp
D. 10W ultra-violet lamp
Choose the correct answer from the options given below.

357819 \(A\) and \(B\) are two metals with threshold frequencies \(1.8 \times {10^{14}}\;Hz\) and \(2.2 \times {10^{14}}\;Hz\).
Two identical photons of energy \(0.825\,eV\) each are incident on them. Then photoelectrons are emitted in
\(({\rm{Take}}\,h = 6.6 \times {10^{ - 34}}Js)\)

357816 The difference between threshold wavelengths for two metal surfaces \(A\) and \(B\) having work function \({\phi _A} = 9eV\) and \({\phi _B} = 4.5eV\) in \(nm\) is Given, \(hc = 1242eVnm\)

357817 The work function of a substance is 4 \({\rm{ }}eV\). The longest wavelength of light that can cause photoelectron emission from this substance is approximately

357818 The threshold wavelength for photoelectric emission from a material is \(5500\) \( \mathop A^{~~\circ} \) . Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a
A. \(75 W\) infra-red lamp
B. \(10 W\) infra-red lamp
C. \(75 W\) ultra-violet lamp
D. 10W ultra-violet lamp
Choose the correct answer from the options given below.

357819 \(A\) and \(B\) are two metals with threshold frequencies \(1.8 \times {10^{14}}\;Hz\) and \(2.2 \times {10^{14}}\;Hz\).
Two identical photons of energy \(0.825\,eV\) each are incident on them. Then photoelectrons are emitted in
\(({\rm{Take}}\,h = 6.6 \times {10^{ - 34}}Js)\)

357816 The difference between threshold wavelengths for two metal surfaces \(A\) and \(B\) having work function \({\phi _A} = 9eV\) and \({\phi _B} = 4.5eV\) in \(nm\) is Given, \(hc = 1242eVnm\)

357817 The work function of a substance is 4 \({\rm{ }}eV\). The longest wavelength of light that can cause photoelectron emission from this substance is approximately

357818 The threshold wavelength for photoelectric emission from a material is \(5500\) \( \mathop A^{~~\circ} \) . Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a
A. \(75 W\) infra-red lamp
B. \(10 W\) infra-red lamp
C. \(75 W\) ultra-violet lamp
D. 10W ultra-violet lamp
Choose the correct answer from the options given below.

357819 \(A\) and \(B\) are two metals with threshold frequencies \(1.8 \times {10^{14}}\;Hz\) and \(2.2 \times {10^{14}}\;Hz\).
Two identical photons of energy \(0.825\,eV\) each are incident on them. Then photoelectrons are emitted in
\(({\rm{Take}}\,h = 6.6 \times {10^{ - 34}}Js)\)