Across
- 1. A particle of light that carries a quantum of energy.
- 2. – The part of the electromagnetic spectrum that can be seen by the human eye (approx. 400–700 nm).
- 8. The symbol for the speed of light in vacuum
- 9. (UV) – Electromagnetic radiation with shorter wavelength than visible light; can eject electrons from metals.
- 10. Function – The minimum energy needed to remove an electron from a metal surface.
- 12. The number of wave cycles that pass a point per second; measured in hertz.
- 15. Energy The energy an electron has after being ejected from a metal:
- 16. The distance between two successive crests or troughs of a wave; symbolized by λ.
- 17. The unit of energy in the SI system; 1 J = 1 kg·m²/s².
- 18. High-energy electromagnetic radiation with very short wavelength.
Down
- 1. Effect The emission of electrons from a metal surface when light of sufficient energy strikes it.
- 3. A negatively charged subatomic particle that can be ejected from a metal in the photoelectric effect.
- 4. A material that can release electrons when struck by light of sufficient energy.
- 5. The symbol used to represent frequency.
- 6. Electromagnetic radiation with the shortest wavelength and highest energy.
- 7. Spectrum – The range of all types of electromagnetic radiation arranged by wavelength or frequency.
- 11. The symbol used to represent wavelength.
- 13. The energy carried by electromagnetic waves or photons.
- 14. The unit of frequency, equal to one cycle per second.