HELP DESK SCIENCE (Holidays homework)


Dear Students! We are here to make our holidays homework much more easier.
Chemistry holidays homework:
1)Presentation related to syllabus chapters.
2)Assignment [Ch-Periodic classification of Elements]

Physics:
Test of full syllabus.

Ask your queries, share the problems you are facing while completing your presentation. Please feel free to share your problems related any topic of physics or chemistry.
Comment on this post and please give us 2-3hours to reply!
Help by at

5 comments:

  1. Navdeep Priya28 December 2011 at 22:25

    I have not understood the Physics concept "why planets don't twinkle" and "How different colors are deviated at different angles"... I referred to many websites, but didn't get appropriate answer! Help me on this!

    ReplyDelete
  2. supreet29 December 2011 at 05:21

    Answer to your first question:"why planets don't twinkle"
    Planets do not twinkle because planets are very close to the earth as compared to the stars. The planets act as extended sources of light. So the intensity of light we receive from the planets is very large. Therefore, the variation in the brightness of the planets is not detected. Hence, planets do not twinkle.
    Source: DINESH super simplified.
    for more info you can visit: http://earthsky.org/space/why-dont-planets-twinkle-as-stars-do
    http://wiki.answers.com/Q/Why_don%27t_planets_twinkle

    Answer to your second question: I think here you are talking about different angles of deviation formed when white light passes trough glass prism.
    Speed of colour in a medium depends upon its wavelength. All the colours have different wavelength. The red colour has the longest wavelength and violet colour has the last wavelength. Therefore, red colour has the highest speed in the glass prism and the violet colour has the lowest speed in the glass prism. Hece, all colours of white light are refracted by different amounts while passing trough the glass prism. Therefore, all the colours have different angles of deviation.
    FOR MORE INFO VISIT: http://www.youtube.com/watch?v=EYcV0CbDC40

    ReplyDelete
  3. Rupali31 December 2011 at 23:26

    What is diffraction of light..not cleary understood??!!

    ReplyDelete
  4. supreet1 January 2012 at 01:21

    please visit this link rupali :
    http://www.youtube.com/watch?v=-mNQW5OShMA

    ReplyDelete
  5. Rupali1 January 2012 at 02:42

    Thankyou for the help!

    ReplyDelete

Subscribe to: Post Comments (Atom)