Question

Which of the following factors affect the distribution of insolation?
i) Length of the day
ii) Angle of inclination of sun rays
iii) Altitude of land
iv) Sunspots
v) Distance between sun and the earth

• A. a) i, ii, iii and iv
  
• B. b) i, ii, iii and iv
• C. c) i, ii and iii
• D. d) All of the above

Answer 1

The correct option is D d) All of the above

d)
Explanation:
Longer the length of the day, longer is the insolation.
Higher the altitude of a place, lesser the angel of sun rays. Thus the net energy gets distributed in a larger area and the energy received per unit area decreases.
Higher lands are away from the main heat source(Ground: conduction and convection) Thus cooler and less insolation.
Sunspots are responsible for the periodic disturbances and explosions on the surface of the sun which in turn influences the amount of insolation received.
Concept of Aphelion and perihelion influences the amount of insolation( Nearer the sun to the earth, more is the insolation and vice-versa)