A particle of light is called a ________________
Fill in the blank(s) with correct word
photon
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The masses of most spiral galaxies, like ours, are a few billion solar masses
Indicate whether the statement is true or false
A car moves from the point (3.0 m)x + (5.0 m)y to the point (8.0 m)x - (7.0 m)y in 2.0 s. What is the direction of the average velocity of the car?
A) 67° from the x-axis B) -67° from the x-axis C) 33° from the x-axis D) -33° from the x-axis E) 52° from the x-axis
Matter Waves: Calculate the kinetic energy, in electron-volts, of a neutron that has a de Broglie wavelength of 7.2 × 10-12 m (mneutron = 1.675 × 10-27 kg, 1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
A film of index of refraction n1 coats a surface with index of refraction n2. When n1
A.
.B.
.C.
.D.
.E.
.