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CBSE Class 10 Answered

Why do stars twinkle?  
Asked by Lalithaong | 28 Sep, 2018, 02:55: PM
answered-by-expert Expert Answer
The air near the earth being always in motion due to convection currents, its density does not remain constant at all the points, it goes on changing, even at points in the same level and therefore, the refractive index at different points changes. So, the rays from a star travelling in a given direction are somtimes concentrated at one point and sometimes at another which results in the twinkling of stars.
Answered by Shiwani Sawant | 28 Sep, 2018, 03:44: PM

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CBSE 10 - Physics
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Asked by satishkumaridup | 12 Aug, 2021, 12:23: AM
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CBSE 10 - Physics
(a)State the property of light that is used by the prism to form a spectrum.
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Asked by vaishnavisharma26.10d | 21 Sep, 2020, 06:58: PM
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CBSE 10 - Physics
Explan the formation of rainbow with the help of diagram
Asked by dhanyahari13 | 24 Jul, 2020, 07:16: PM
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CBSE 10 - Physics
Sir , l have a doubt about refraction of glass prism.     
Asked by tanushrimanish7234.bmps | 26 Apr, 2020, 03:50: PM
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CBSE 10 - Physics
Give an passage of recommendation of spectrum  colours to give white light
Asked by mkyadav8735 | 14 Jan, 2020, 02:07: AM
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CBSE 10 - Physics
When white light passing through prism it split into seven colours but when light passing through glass slab it can't split into seven colours why?
Asked by shikhakumari2162 | 01 Dec, 2019, 07:01: PM
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CBSE 10 - Physics
Violet colour is seen at the bottom of the spectrum when white light is dispersed by a prism. State reasons to explain these observations.
Asked by rushabhjain.av | 20 Mar, 2019, 06:38: AM
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CBSE 10 - Physics
Why do stars twinkle?  
Asked by Lalithaong | 28 Sep, 2018, 02:55: PM
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CBSE 10 - Physics
What is a spectrum?
Asked by Topperlearning User | 16 May, 2014, 02:38: PM
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CBSE 10 - Physics
Can we recombine the seven spectral colors to obtain white light? Justify your answer.
Asked by Topperlearning User | 16 May, 2014, 02:35: PM
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