Tell me what is Huygens Principle with diagram (4marks question) please don't copy or spam​

Huygens’ principle, in optics, a statement that all points of a wave front of light in a vacuum or transparent medium may be regarded as new sources of wavelets that expand in every direction at a rate depending on their velocities. Proposed by the Dutch mathematician, physicist, and astronomer, Christiaan Huygens, in 1690, it is a powerful method for studying various optical phenomena.

Explanation:

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

because growing process had stoped after 4-5 year