When Mercury or Venus passes in front of the disk of the Sun, we call this
A) an eclipse
B) a shadow event
C) a transit
D) an occultation
C
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A muon formed high in the Earth's atmosphere travels at a speed 0.870c for a distance of 4.00 km before it decays. What is the muon's lifetime as measured in its reference frame?
a. 3.1E–5 s b. 7.6E–6 s c. 1.5E–5 s d. 5.1E–5 s e. 4.3E–5 s
The objective lens of a telescope has a focal length of 1.90 m. When viewed through this telescope, the Moon appears 5.25 times larger than normal. How far apart are the objective lens and the eyepiece when this instrument is focused on the Moon?
What will be an ideal response?
If it is 1:00 P.M. EST in Washington, D.C., what is the time in Denver, Colorado, the longitude of which is 30° more westerly?
a. 9:00 A.M. MST b. 11:00 A.M. MST c. 3:00 P.M. MST d. Noon. MST
Liquid crystal displays make use of interference of light
Indicate whether the statement is true or false