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By which of the following symbol is solar Declination denoted by ____________(a) δ(b) ρ(c) Δ(d) γThe question was asked by my school teacher while I was bunking the class.The question is from Solar Constant topic in division Solar Energy of Energy Engineering

Answer»

The CORRECT answer is (a) δ

Easy EXPLANATION: Solar declination is denoted by Greek letter δ(DELTA). Solar declination is the ANGLE between the earth-sun LINE and the equatorial plane. Solar declination varies throughout the year. And is given by cooper equation,

δ = 23.45sin [(360/365) (284+n)] ∵n is day of the year.



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