Mentors Comments: Explain the concept of Sun-spot cycle with special reference to solar minimum. Explain the changes that it brings on sun’s surface during solar minimum. Discuss the effects of solar minimum on earth. Answer: Sun-spot cycle is the solar magnetic activity cycle with the average time period of eleven years. It refers to changes … Continue reading Explain the concept of Sun-spot cycle. In view of the approaching Solar minimum, highlight the changes that it brings on the sun’s surface and the effects that it has on earth. (250 words)