Author Question: A radar installation operates at 9 000 MHz with an antenna (dish) that is 15 meters across. ... (Read 63 times)

ETearle · **on:** Jul 28, 2018

A radar installation operates at 9 000 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

Question 2

A binary star system in the constellation Orion has an angular separation between the two stars of 1.2 10-5 radians. If l = 5 10-7 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