Of the various types of electromagnetic radiation, the shortest wavelengths are the most penetrating through all forms of matter. Which of the following is it?
a. ultraviolet
c. infrared
b. gamma
d. visible light
Question 2
A bat, flying at 3.00 m/s toward a wall, emits a chirp at 50.0 kHz. If the wall reflects this sound pulse, what is the frequency of the echo received by the bat? (vsound = 340 m/s)
a. 51.5 kHz
c. 40.8 kHz
b. 51.2 kHz
d. 50.9 kHz