Zero Shadow Day 

Zero Shadow Day 

• Recently, Bengaluru experienced a ‘Zero Shadow Day’, when vertical objects appear to cast no shadow
• At precisely 12:17 pm, vertical objects such as buildings and trees appeared to have no shadows. 
• This occurred because the sun was directly overhead, at its zenith, causing the shadow to be directly beneath the object.
•  It happens twice a year for every point on Earth between the Tropic of Cancer and the Tropic of Capricorn.
• As the Earth revolves around the Sun, it also rotates on its axis. During the year, the Sun’s location moves from 23.5 degrees south of the celestial equator to 23.5 degrees north of the equator (Uttarayan), and then back again (Dakshinayan). 
• All places whose latitude equals the angle between the Sun’s location and the equator on that day experience Zero Shadow Day

Practice Questions for Prelims

Consider the following statements:
1. Winter Solstice in the Southern hemisphere when the Southern hemisphere will have the longest day and shortest night.
2. Summer Solstice in the Northern hemisphere when the Northern hemisphere will have the shortest day and longest night.
Select the correct answer using the code given below:
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2

Ans. a)

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