Physics

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Across
  1. 2. Used to obtain spectrum
  2. 5. Gave us law of elasticity
  3. 6. Effect responsible for change in frequency due to relative motion
  4. 10. a thermoelectric device for measuring temperature, consisting of two wires of different metals connected at two points, a voltage being developed between the two junctions in proportion to the temperature difference.
  5. 12. interference pattern between two sounds of slightly different frequencies
  6. 13. the layer of the earth's atmosphere which contains a high concentration of free electrons and is able to reflect radio waves
  7. 15. the failure of rays to converge at one focus
  8. 16. He gave us absolute zero
  9. 17. a massive and extremely remote celestial object, emitting exceptionally large amounts of energy,
  10. 19. isotope of hydrogen
  11. 21. responsible for current in a semiconductor
  12. 22. light can be sent from earth to moon
  13. 24. star-forming regions
  14. 25. Addition of impurity
Down
  1. 1. bending of light when it encounters a sharp edge
  2. 3. Force required to open the tap
  3. 4. Gave us laws of planetary motion
  4. 7. the SI unit of luminous flux
  5. 8. Gave wave theory of light
  6. 9. His law is used in working of dynamo
  7. 11. Too lazy to move if you don’t push it
  8. 14. store charges
  9. 18. Nuclear particle
  10. 20. the SI unit of magnetic field
  11. 23. Northern lights