A semiconductor has an energy gap of 2.5 eV. What is the longest wavelength light of those listed below that will promote valence electrons into the conduction band?
A)
450 nm
B)
525 nm
C)
600 nm
D)
725 nm
E)
350 nm
A
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A star has a parallax angle of 0.019 seconds of arc. How far away is this star from Earth?
What will be an ideal response?
Reactance: The reactance of a capacitor is 4.0 ? at a frequency of 0.60 kHz. What is the capacitance?
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