Light field vocab 1

4. Has magnitude and direction (6)
5. Related to one another, one implies the other (10)
7. Radiance or luminance (10)
11. An elementary particle, the quantum of light (6)
12. A signal modified by a carrier wave (9)
15. light amplification by stimulated emission of radiation (5)
16. SI unit of solid angle (9)
19. Radiance is the integral of the _______ radiance over all frequencies or wavelengths (8)
21. SI unit of radiance (4)
22. Rest mass of a photon (4)
23. Old word for travelling (6)

1. A type of polarisation when the electric field component of the light wave doesn't stay in one plane but instead rotates at the frequency of the light (8)
2. Structured light, concentric rings (6,4)
3. SI unit of energy 5)
6. Describes the amount of light faring in every direction through every point in space (10)
8. Intrinsic form of angular momentum carried by elementary particles (4)
9. Confusingly could mean radiance or irradiance or radiosity (9)
10. Radiant energy per unit time emitted, reflected, transmitted or received by a surface, per unit solid angle per unit projected area (8)
13. Left-handed or right-handed (9)
14. American spelling for when a wave is restricted to a single plane (9)
17. Opaqueness, lack of transparency, you can't see through it (7)
18. Rate of flow of energy (4)
20. Vibrating sympathetically (8)