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b)Note ▪ Ans b) The solar time is 15:06 and yes it is

down the different from 3 (15.00) pm.
‘solar • This change is quantified by the equation of

time’. Is it time, and is due to the eccentricity of the

different Earth's orbit (i.e. the Earth's orbit is not

from 3pm? perfectly circular, meaning that the Earth-
If yes, then Sun distance varies throughout the year),

why is it and the fact that the Earth's axis is not

different? perpendicular to the plane of its orbit (the
so-

▫ called obliquity of the ecliptic).

C)What is • The effect of this is that a clock running at
the highest a constant rate – e.g. completing the same

and lowest number of pendulum swings in each hour

altitude – cannot follow the actual Sun; instead it
that the follows an imaginary "mean Sun" that

sun moves along the celestial equator at a
constant rate that matches the real Sun's
reaches at average rate over the year.

Noon for
this • Ans c) The sun altitude at 12 noon is 84.27

latitude? and the highest and lowest altitude will be

90 and 80 respectively.

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