Answer:
A
Explanation:
2009, due to a maximum in the solar cycle, a very intense cycle of solar activity, kind of an x-class solar flare the highest.
Answer:
Correct option : (c) period.
Explanation:
The time that is required for a vibrating object to complete one full cycle is called the time period. If f is the frequency of a wave, then the relation between the frequency and the time period is given by :
These are the characteristics of a wave. Some other characteristics are wavelength, amplitude, intensity etc. So, the correct option is (c) "period".
390 Because it is what it is