A monochromatic light beam is incident on the surface of a metal having a work function of 2.50 eV
If a 1.0-V stopping potential is required to make the electron current zero, what is the wavelength of light? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 355 nm
B) 423 nm
C) 497 nm
D) 744 nm
A
You might also like to view...
Greta and her family float higher in the dense water of the Dead Sea because
A) less volume of water is displaced. B) more volume of water is displaced. C) of a greater buoyant force.
Some minerals glow when illuminated with ultraviolet light because
A) ultraviolet photons boost atomic electrons in the mineral to higher energy states. B) ultraviolet photons have high energy. C) of selective reflection. D) of selective transmission. E) none of the above
Magnetic confinement is used in controlled fusion experiments to control a plasma
Indicate whether the statement is true or false
Phobos is so close to Mars that tides are currently making its orbit _______________
Fill in the blank(s) with correct word