Question

40. a) Stars appear to twinkle but planets do not appear to twinkle why ?
b) What is meant by short sightedness? Draw the diagram which corrects
that.

Answer 1

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a) Unlike stars, planets don't twinkle. Stars are so distant that they appear as pinpoints of light in the night sky, even when viewed through a telescope. Because all the light is coming from a single point, its path is highly susceptible to atmospheric interference (i.e. their light is easily diffracted).

b) Short-sightedness, or myopia, is a very common eye condition that causes distant objects to appear blurred, while close objects can be seen clearly. It's thought to affect up to 1 in 3 people in the UK and is becoming more common.

Answer 2

a.)ACCRODING TO The scientist or ASTRONOMY The stars have gases present in them ,so it causes Explosion in them .and the planets do not have such thing . so , stars appear to twinkle but planets do not appear to twinkle.