What is the evidence that gamma-ray bursts originate from beyond the Milky Way Galaxy?
What will be an ideal response?
The distribution of gamma-ray bursts is distributed uniformly on the sky, unlike the distribution of X-ray binaries, neutron stars, and other objects within the Galaxy. Further, the afterglow of some gamma-ray bursts have now been detected and detailed observations at other wavelengths show that they are located at the position (and redshift) of distant galaxies.
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An electron and a baseball move at the same speed. Which has the longer wavelength?
A) the electron B) the baseball C) both the same D) none of the above
Briefly describe the three most commonly used methods of indirect planet detection
What will be an ideal response?
A ball is thrown at an angle of ? above the horizontal. If there is no acceleration due to gravity the ball will follow a straight-line path
Indicate whether the statement is true or false
When a p-n junction diode is forward biased
A) a current does not flow through it. B) a current flows through it from the p-side to the n-side. C) a current flows through it from the n-side to the p-side. D) a current flows because holes and electrons are traveling in opposite directions away from the junction. E) a current flows because holes and electrons are traveling in the same direction towards the junction.