How does the escape speed from Mars compare with that of the Earth? [ MEarth=9.31? MMars ; REarth=1.88 ? RMars ]
A) 222.%
B) 22.5%
C) 44.9%
D) 66.2%
E) 20.2%
C
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Monochromatic light (l = 500 nm) is incident on a soap bubble (n = 1.4) that is 500-nm thick. Calculate the change of phase of the light that penetrates the front surface, reflects from the second surface, and emerges through the first surface as an angle between 0° and 360°?
a. 280° b. 160° c. 220° d. 100° e. 290°