Dispersion- Old is Gold

  1. When white light is dispersed by a prism, red light appears at the top of the spectrum whereas violet at the bottom. Why?
  2. How is dispersive power related to refractive index of the material?
  3. Explain why a mirror cannot give rise to chromatic aberration.
  4. Why a number of dark lines seen in the spectrum of light from the sun?
  5. Why there is no dispersion of monochromatic light?
  6. What do you mean by dispersive power?
  7. Explain the meaning of achromatism in a lens.
  8. What is the cause of dispersion of light?
  9. Why is sky blue? Explain.
  10. The sun looks red at sun-rise and sun-set. Why?
  11. Distinguish between chromatic aberration and spherical aberration.

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