If an electron has the same de Broglie wavelength as the wavelength of a 390-nm photon in vacuum, what is the speed of the electron?
(melectron = 9.11 × 10-31 kg, c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 1,900 m/s
B) 2,100 m/s
C) 1,700m/s
D) 1,500 m/s
E) 540 m/s
A
You might also like to view...
Gabbro and rhyolite are classified as ______________rocks
Fill in the blank(s) with correct word
What are the disadvantages of using a water-in-glass thermometer to measure outside air temperature?
Which of the following would you expect to be very common in globular clusters?
A) high-mass main-sequence stars B) low-mass main-sequence stars C) supernova remnants D) x-ray binaries E) supergiant stars
Early AM radios required very long antennae wires. FM antennae are often approximately a meter in size. Can you surmise why sensitive FM aerials are much smaller than those AM wires?
What will be an ideal response?