How do silkworm respond to bright light?

Bright light therapy imitates natural light. Having access to a good light source and a regular routine will enhance the treatment.

Your retina has more than one type of cell that perceives and transmits light. Cones are cells that respond to color, but they respond best in bright light. In very dim light, the cells that respond to light are called rods, which are blind to color.

Ameobas are classified as one celled protozoans. They respond to bright light, by moving away from it. Many of them live in thin layers of water and it's important that they don't dry out, so it's obviously better to be in shadow.