Asked/Added Questions From NCERT:

Question 1. Asked on :21 August 2019:06:24:36 PM

 Why do planets not twinkle?

-Added by Himanshi Verma Science » The Human And The Colourful World


Himanshi Verma

 The planets are much closer to the earth and are thus seen as extended source. If we consider a planet 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 individual point sized sources will average out to zero and will nullify the twinkling effect.

-Answered by Himanshi Verma On 21 August 2019:06:27:31 PM

Question 2. Asked on :21 August 2019:05:47:03 PM

 What is accomodation?

-Added by Himanshi Verma Science » The Human And The Colourful World


Himanshi Verma

 The ability of the eye lens to adjust its focal length is called accomodation. Focal length can be changed with the help of ciliary muscles.

-Answered by Himanshi Verma On 21 August 2019:05:49:41 PM


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