Sample Exam
Sample Exam
Sample Exam
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Electromagnetic Waves [20 Points]<br />
A large parabolic solar detector with radius 25.0 m is mounted to a solar<br />
probe with total mass 2500 kg which is placed in space near the Earth’s<br />
orbit. The solar detector absorbs solar radiation with intensity 1340 W/m 2 .<br />
a) Find the amplitude of the electric field for the solar radiation? [5 points]<br />
Answer: E = 1005 V/m<br />
b) Find the amplitude of the magnetic field for the solar radiation? [4 points]<br />
Answer: B = 3.35 µT<br />
c) Determine the solar power absorbed by the solar detector. [3 points]<br />
Answer: P = 2.63 MW<br />
d) Ignoring all gravitational effects, determine the acceleration of the solar<br />
probe due to the soar radiation pressure. [4 points]<br />
Answer: a = 3.51 x 10 -6 m/s 2<br />
e) Find the probe’s speed as it reaches Mars 7.80 x 10 10 m away. Ignore all<br />
gravitational effects and assume the probe starts from rest and the solar<br />
intensity remains constant. [4 points]<br />
Answer: v = 740 m/s
Change language