A single slit, which is 0.050 mm wide, is illuminated by light of 550 nm wavelength. What is the angular separation between the first two minima on either side of the central maximum?
A) 0.36°
B) 0.47°
C) 0.54°
D) 0.63°
E) 0.73°
Answer: D
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A) because they are obvious only at speeds that we never experience in our daily lives B) because they are self-contradictory, making it impossible to make any sense of them C) because they contradict the well-tested ideas of Newton's laws of motion D) because they affect only subatomic particles and not big things like people
The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1. How much brighter does the Sun appear than Sirius?
What will be an ideal response?
Which is larger, a newton or a pound?
a. a newton b. a pound c. This question is nonsense—they don't measure the same physical quantity. d. They are the same size.
The altimeter in an aircraft is an aneroid barometer
a. True b. False Indicate whether the statement is true or false