Why do planets not twinkle?
AThey are extended
BThey are enlarged
CThey are enclosed
DThey are eclipsed
Answer & Solution
Correct answer: A. They are extended
1. Planets are much closer to the earth.
2. Variations from many points average out to zero.
3. They are seen as extended sources.
_Source: NCERT Class 10 Science, Ch 11 'The Human Eye and the Colourful World'_
Related questions
Red is used for danger signals because it is:The sky is blue because the atmosphere scatters light of:Scattering of light by colloidal particles gives rise to the:The twinkling of a star is due to atmospheric:Who was the first to use a glass prism to obtain the spectrum?The acronym for the colours of the spectrum is:A person with both myopia and hypermetropia needs which lenses?Presbyopia arises from weakening of which muscles?