Suppose a snowy cricket is chirping when the temperature is 65.0 degrees Fahrenheit. How many oscillations does the radiation from a cesium-133 atom complete between successive chirps?
A. 7.98 × 107
B. 3.68 × 108
C. 4.78 × 109
D. 9.58 × 109
Answer:
We have number of chirps in 13s N = T- 40
Here 
Therefore N = 65 - 40
= 25 Chirps in 13s
Then time taken for successive chirps is 
But time taken for radiation from a cesium-133 to complete 9,192,631,770 cycles is 1s.
Therefore number of oscillations in 1s is 9,192,631,770
Then the number of oscillations in 0.867s is
So, option C. is correct.