Electrons are emitted from a surface when light of wavelength 500 nm is shone on the surface but electrons are not emitted for longer wavelengths of light. The work function of the surface is
A) 5.0 eV.
B) 0.60 eV.
C) 2.5 eV.
D) 4.0 eV.
E) 0.40 eV.
C
You might also like to view...
A Udimet 700 turbine blade is exposed to a temperature of 1200 K (2160 R) at a tensile stress of 140 MPa (20 ksi)? How many hours is the turbine blade expected to survive these conditions?
What will be an ideal response?
Which of the following is a real piece of evidence (from the New Horizons mission) pointing to recent or ongoing geological activity on Pluto?
A) surface regions that suggest glacial movement of frozen ices of nitrogen and methane B) surface regions that show evidence of flooding by liquid water C) crater rims showing evidence of erosion by rainfall D) several towering volcanoes discovered on its surface
Explain how the Doppler Effect has been used to detect invisible planets orbiting other Sun-like stars
What will be an ideal response?
Decreasing the voltage across the two plates of a capacitor will produce what effect on the capacitor?
a. decrease charge c. decrease capacitance b. increase capacitance d. increase charge