The gold medal winner in Olympic downhill skiing manages to descend the course a

Question

The gold medal winner in Olympic downhill skiing manages to descend the course at 0. 87c .How do they perceive the length of the course (in km), compared to the measurement of 3 km made by the organizers?

A light beam fired from the start passes the skier halfway down the run. How fast does the skier measure the light as moving (in m/s)? Why?

KBCO transmits at FM 97.3 MHz. The campus AM station (Radio 1190) broadcasts at 1190kHz. What are the wavelengths (in m) of the radio waves from these two stations?

Explanation / Answer

KBCO transmits at FM 97.3 MHz. The campus AM station (Radio 1190) broadcasts at 1190kHz. What are the wavelengths (in m) of the radio waves from these two stations?

Given

f1 = 97.3 MHz ; f2 = 1190 kHz

We know that

v = f lambda => lambda = v/f

lambda1 = 3 x 10^8/(97.3 x 10^6) = 3.08 m

Hence, lambda1 = 3.08 m

lambda2 = 3 x 10^8/(1190 x 10^3) = 252.1 m

Hence, lambda2 = 252.1 m

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