A proton and an electron each have the same de Broglie wavelength. (i) Which has the greater speed, and (ii) which has the greater kinetic energy?
a. (i) the electron, (ii) Either one can have the greater kinetic energy.
b. (i) the proton, (ii) Either one can have the greater kinetic energy.
c. (i) the electron, (ii) the electron
d. (i) the proton, (ii) the proton
c
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Wien's Law: The surface temperature of the star is 6000 K. At what wavelength is its light output a maximum? The constant in Wien's law is 0.00290 m ? K.
A. 850 nm B. 907 nm C. 311 nm D. 483 nm E. 502 nm
According to Einstein's theory of special relativity
A) space and time are aspects of each other. B) energy and mass are aspects of each other. C) both of these D) neither of these
In an annular eclipse,
A) the Sun appears as a thin, bright ring. B) the Moon appears as a thin, bright ring. C) the Moon is totally blocked by the Earth. D) the Sun is partially blocked by the Earth. E) the Sun is totally blocked by the Moon.
Suppose a future telescope is able to take a spectrum of a terrestrial planet around another star and reveals the presence of significant amounts of ozone. What would this mean, and why?
What will be an ideal response?