31. The oil droplets filter incident light before it reaches the visual pigment in outer segments of the photoreceptors. 32. The light detectors absorb incident light and produce a small amount of electricity that stimulates the retinal neurons. 33. It either absorbs and re-emits the incident light , or rotates its polarization by the Faraday or Voigt effect. 34. Higher efficiencies ( around 30 % ) can be obtained by using optics to concentrate the incident light . 35. An important comparison point is rather the output power per unit area generated with the same incident light . 36. The effect of incident light on the conductivity of the material depends on the energy of light and material. 37. The response of film when the incident light is near the white level of the film is more gradual. 38. Gratings which modulate the phase rather than the amplitude of the incident light are also produced, frequently using holography. 39. A polished finish gives the surface a high luster and strong reflection of incident light ( almost mirror-like ). 40. The power and direction of the incident light is determined by the mirrors state, which itself is controlled electrostatically.
