The Earth-Moon distance is about 60 times the radius of the earth. What will be the approximate angular diameter of the earth as seen from the moon? 

 

 

Asked by nellore.jayasai | 16th Jan, 2019, 07:58: AM

Expert Answer:

Aangular diameter = tanΘ = 2×fraction numerator r a d i u s space o f space e a r t h over denominator d i a tan c e space b e t w e e space m o o n space a n d space e a r t h end fraction space equals space fraction numerator x over denominator 60 x end fraction space equals space 1 over 60×2
 So Θ = arctan(1/30)
 
Diagram is attached for clarifications 

Answered by Ankit K | 17th Jan, 2019, 03:33: PM