In comparing first magnitude Deneb with second magnitude Polaris, we find that:
A) Polaris is in reality much more luminous.
B) Deneb must be much hotter than Polaris.
C) Deneb appears 2.5 times brighter to us than does Polaris.
D) Polaris is really 100 times brighter than nearby Deneb.
E) Deneb is really much closer than Polaris.
C
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What will you see with the following type of optic: Convex lens
A. Image is smaller |
B. Image is the same |
C. Image is larger |
What is the approximate latitude and longitude of the South American location marked by the black dot on this diagram?
A) latitude = 15ºS, longitude = 45ºW B) latitude = 30ºW, longitude = 60ºN C) latitude = 15ºN, longitude = 45ºW D) latitude = 15ºS, longitude = 75ºW
Distant bright snowy mountains appear yellowish because
A) they are far away. B) blue has been scattered away from light reflected from the mountains. C) the color yellow looks just right. D) of nature's wonderful preferences.
Although we cannot see virtual particles, some experimental evidence suggests that they really exist
Indicate whether the statement is true or false