If we restrict the vibrations of the electric field vector of a wave to one direction, the wave is said to be linearly ______________.
Fill in the blank(s) with correct word
[Ques. 2] A radar installation operates at 9000 MHz with an antenna (dish) that is 15 meters across. Determine the maximum distance (in kilometers) for which this system can distinguish two aircraft 100 meters apart.
a. 7.4 km
b. 370 km
c. 3700 m
d. 37 km
e. 740 km
[Ques. 3] The Moon's orbital plane is inclined to Earth's orbital plane by
a. 0.
b. 5.
c. 23.5.
d. 30.
[Ques. 4] For total internal reflection, light is reflected and none is ______________.
Fill in the blank(s) with correct word
[Ques. 5] A binary star system in the constellation Orion has an angular separation between the two stars of 1.2 105 radians. If = 5 107 m, what is the smallest aperture (diameter) telescope that may be used to resolve the two stars?
a. 10 cm
b. 5 cm
c. 50 cm
d. 1 m
e. 4 cm
[Ques. 6] The Moon completes one orbit around Earth about every
a. 29.5 days.
b. 7 days.
c. 365 days.
d. sidereal day.
[Ques. 7] Total internal reflection occurs when the angle of incidence of the light is greater than the ______________ angle.
Fill in the blank(s) with correct word
[Ques. 8] At what distance could one theoretically distinguish two automobile headlights separated by 1.5 meters? Assume a pupil diameter of 0.50 cm and yellow headlights seen at the wavelength 5.0 107 m. Assume eye fluid has an average n = 1.33.
a. 6.0 km
b. 12 km
c. 9.0 km
d. 3.0 km
e. 16 km
[Ques. 9] The Moon
a. revolves about Earth from west to east.
b. has a day equal to 29.5 Earth days.
c. has an elliptical orbit about Earth.
d. all of these.
[Ques. 10] Light traveling from a more dense to a less dense medium is refracted ______________ the normal.
Fill in the blank(s) with correct word
Quick Reply
