• Chandra dhawan Best Answer
    see attachment
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    Chandra dhawan
  • Ruby negi thankyou
    seee these..
    • cropped-1701152654.jpg
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    Ruby negi
  • Somnath thankyou
    See the attached file.Only difference is that here refractive index i's represented buy letter n.
    • cropped3748030472989474269.jpg
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  • Vaishnavi rajora
    see attached
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    Vaishnavi rajora
    hope it will help you