Which of the following provides evidence that light is made of waves?
A) The individual dots seen on a photographic plate when a photo is taken at extremely short exposure times
B) Interference effects seen when light passes through a narrow opening
C) Both of the above.
D) Experiments that spread light out into a spectrum of colors
E) All of the above.
B
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The principle difference between a step-up and step-down transformer is
A) step-up transformers can handle more current. B) different geometries. C) different ratios of turns of wire for each. D) none of the above
Einstein's prediction of the curvature of space was confirmed by the 1919 total solar eclipse
Indicate whether the statement is true or false
The speed of light in diamond is 1.24 × 10^8m/s. What is the index of refraction of diamond?
A molecule of roughly spherical shape has a mass of 1.80 × 10-25 kg and a diameter of 0.6 nm
If the uncertainty in the measured position of the molecule is equal to the molecular diameter, what is the minimum uncertainty in the speed of the molecule? (h = 6.626 × 10-34 J ? s) A) 100 m/s B) 10 m/s C) 0.1 m/s D) 1 m/s E) 0.01 m/s