At sunset, the sun appears reddish. What is MOST LIKELY the reason for this phenomenon?
2 answers:
<u>Answer :</u>
(A)" Sunlight travels through a longer distance at sunset and interacts with more particles ".
Explanation :
The sunlight is made up of seven colors. The wavelength of red light is maximum as compared to other colors.
And as per <em>Rayleigh law</em>
Where,
I is the intensity of scattered light
is the wavelength
The scattering of red light is least.
At sunset, the sunlight travels through a longer distance.This is because they are near to horizon.
Also, there are many particles, dust and moisture are present in the atmosphere in the evening. So, the sun appears reddish.
Hence, the correct option is (A).
You might be interested in
This question is incomplete, the complete question is;
Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 11.5 cm from their point of intersection, as shown in the figure.
For what angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0 cmcm long) after reflecting from the first mirror
Answer: angle of incidence is 39.4°
Explanation:
Given that;
two plain mirrors intersect at right angle (90°)
distance d = 11.5 cm
S = 28.0 cm
Now the angle that the reflection ray males with first the mirror equal theta (∅)
so
tan∅ = (S/2) / d
tan∅ = (28/2) / 11.5
tan∅ = 14 / 11.5
tan∅ = 1.2173
∅ = tan⁻¹ (1.2173)
∅ = 50.6°
so angle of incidence = 90° - ∅
= 90° - 50.6°
= 39.4°
Therefore angle of incidence is 39.4°
