Page 35 - stuti srivastava 76 electives assignment compilation

b)Note down the
‘solar time’. Is it ▪ Ans b) The solar time is 15:06 and yes it is different from 3 (15.00) pm.
different from • This change is quantified by the equation of time, and is due to the

3pm? If yes, then eccentricity of the Earth's orbit (i.e. the Earth's orbit is not perfectly
why is it circular, meaning that the Earth-Sun distance varies throughout

different? the year), and the fact that the Earth's axis is not perpendicular to

the plane of its orbit (the so-
▫ called obliquity of the ecliptic).
C)What is the • The effect of this is that a clock running at a constant rate – e.g.
highest and completing the same number of pendulum swings in each hour –

lowest altitude cannot follow the actual Sun; instead it follows an imaginary
that the sun "mean Sun" that moves along the celestial equator at a constant

reaches at Noon rate that matches the real Sun's average rate over the year.
for this latitude?

• Ans c) The sun altitude at 12 noon is 84.27 and the highest and
lowest altitude will be 90 and 80 respectively.

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