The light reflected from a soap bubble (n = 1.40) appears red (? = 640 nm) at its center. What is the minimum thickness (in nm)?

A. 124
B. 104
C. 114
D. 134
E. 234


Answer: C

Physics & Space Science

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What unit is used to measure wavelengths?

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Gravitational Force: As a 70-kg person stands at the seashore gazing at the tides (which are caused by the Moon), how large is the gravitational force on that person due to the Moon? The mass of the Moon is 7.35 × 1022 kg, the distance to the Moon is 3.82 × 108 m, and G = 6.67 × 10-11 N ? m2/kg2.

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Suppose a "psychic" tells you that "At midnight tonight, everything will double in size." This statement is

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A proton moving with a speed of 3.20 × 10^5 m/s perpendicular to a uniform magnetic field of 0.0786 T will follow which of the paths described below? (qp = 1.60 × 10^?19 C and mp = 1.67 × 10^?27 kg)

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