Modern Physics

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Across
  1. 3. Third letter in the Greek alphabet
  2. 4. Second letter in the Greek alphabet
  3. 6. particle A photon
  4. 8. Involves half the time for a substance to fall
  5. 10. Particle that is irreducible
  6. 11. to liquify or melt by heat
  7. 12. Quantum of electromagnetic energy
Down
  1. 1. disturbance or oscillation
  2. 2. emission of energy by rays
  3. 5. First letter in the Greek Alphabet
  4. 7. To disintegrate or diminish
  5. 9. Process of splitting into parts