A soap bubble (n = 1.35) is floating in air. If the thickness of the bubble wall is 115 nm, what visible light wavelength is most strongly reflected?
[Ques. 2] A waning crescent moon can appear on an observer's meridian between ______________ and ______________. (Answers in times of day.)
Fill in the blank(s) with correct word
[Ques. 3] The electric company charges a home on the basis of consumption of
a. resistance.
b. energy.
c. current.
d. voltage.
e. power.
[Ques. 4] Suppose two flat glass plates 30-cm long are in contact along one end and separated by a human hair at the other end. If the diameter of the hair is 50 m, find the separation of the interference fringes when the plates are illuminated by green light, = 546 nm.
[Ques. 5] The bright side of the waxing crescent moon is toward the ______________.
Fill in the blank(s) with correct word
[Ques. 6] Voltage is defined as the ______________ per unit ______________.
a. charge; current
b. work; current
c. charge; work
d. work; charge
[Ques. 7] Nonreflective coatings for camera lenses reduce the loss of light at various surfaces of multi-lens systems, as well as preventing internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride (n = 1.38) on flint glass (n = 1.66) that will cause destructive interference of reflected light of wavelength = 550 nm, a wavelength which is near the middle of the visual spectrum.
[Ques. 8] When the Moon appears on an observer's meridian at 4 A.M., the Moon is in the ______________ phase.
Fill in the blank(s) with correct word
[Ques. 9] A component in an automobile 12-V electrical system has a resistance of 20 . How much energy is dissipated by the component each second?
a. 0.14 J
b. 7.2 J
c. 1.7 J
d. 0.6 J
[Ques. 10] In a double-slit experiment using light of wavelength 486 nm, the slit spacing is 0.600 mm and the screen is 2.00 m from the slits. Find the distance along the screen between adjacent bright fringes.
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