Question 11 Mark
Assertion (A) : The stars twinkle while the planet do not.
Reason (R) : The stars are much bigger in size than the planets.
Reason (R) : The stars are much bigger in size than the planets.
Answer
View full question & answer→(B) Both A and R are true but R is not the correct explanation of A .
Explanation :
As planets are of larger size than stars and much closer to the earth, planets can be considered as a collection of a large number of point-sized sources of light. The total variation in the amount of light entering our eye from all these individual point-sized sources will average out to zero which nullifies the twinkling effect of each other. Therefore, planets do not twinkle.
Explanation :
As planets are of larger size than stars and much closer to the earth, planets can be considered as a collection of a large number of point-sized sources of light. The total variation in the amount of light entering our eye from all these individual point-sized sources will average out to zero which nullifies the twinkling effect of each other. Therefore, planets do not twinkle.