Consider a beam of free particles with a certain speed . If we double this speed, what happens to the beam’s de Broglie wavelength?

A. It increases by a factor of 2.
B. It increases by a factor of 21/2.
C. It remains the same.
D. It decreases by a factor of 21/2.
E. It decreases by a factor of 2.


E. It decreases by a factor of 2.

Physics & Space Science

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Define the term viscosity.

What will be an ideal response?

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Stars with masses greater than 1.1 solar masses use the ____________________ to convert hydrogen into helium and produce energy

Fill in the blank(s) with correct word

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Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.4) that is 50 mm thick. What is the change of phase of the light reflected from the front surface?

a. 0 b. 180° c. ?/2 d. ?/2 e. 55°

Physics & Space Science

It there were no gravity a stone thrown upward at 45 degrees would follow a straight-line path. But because of gravity, at the end of 1 second, the stone is actually

A) 5 m below the straight line. B) 10 m below the straight line. C) 15 m below the straight line.

Physics & Space Science