10th Class Science Human Eye and Colourful World

  • question_answer 38)
        Is the position of a star as seen by us its true position? Justify your answer.

    Answer:

                      No, what is seen is not true. The starlight on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction occurs in a medium of gradually changing refractive index. Since, the atmosphere bends starlight towards the normal, the apparent position of the star is slightly different from its actual position. Thus, star appears slightly higher (above) than its actual position,  


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