Question

If the angle of elevation of sun increases from $0^o$ to ${90}^o$ then what will be the change in length of shadow of tower?

• A. No change in length of shadow
• B. Length of shadow increases
• C. Length of shadow decreases
• D. Length of shadow will be zero

Answer 1

Answer: (C), (D)

The correct options are
C Length of shadow decreases
D Length of shadow will be zero

Length of shadow decreases and will be zero.
"Angle of elevation" is the angle between the thing being referenced and the horizontal. So, when the sun rises the angle of elevation increases and your shadow becomes shorter. When the sun is directly overhead, you don't have a shadow and the angle of elevation is 90, which is the greatest angle. So, the closer to midday, the shorter the shadow and the greater the angle of elevation.