An electron is accelerated through a potential difference of 25000 V. What is the de Broglie wavelength of the electron (in m)?
a. 5.9 × 10^?12
b. 6.8 × 10^?12
c. 6.5 × 10^?12
d. 7.8 × 10^?12
e. 5.5 × 10^?12
d
You might also like to view...
The following objects are found in a spiral arm of a galaxy. Which is the exception?
a. population II stars b. OB associations c. emission nebulae d. population I stars e. clouds of gas and dust
The period-luminosity law of pulsating variable stars indicates that
A. the period of pulsation is independent of luminosity. B. the more slowly a star pulsates, the more luminous it is. C. the faster a star pulsates, the more luminous it is. D. None of these choices is correct.
When the Moon passes directly between the Sun and the Earth, we see a lunar eclipse
Indicate whether the statement is true or false
Air near the equator averages higher temperatures than air near the poles because
A) polar air is cooled by ice and snow on the ground. B) solar energy is readily absorbed due to increased levels of CO2 and water vapor in the air. C) sunlight falls in a more vertical position at the equator than near the poles. D) the oceans near the equator are warmer than those near the poles.