The focus of Lesson 2 will be upon the visible light region - the very narrow band of wavelengths located to the right of the infrared region and to the left of the ultraviolet region. Though electromagnetic waves exist in a vast range of wavelengths, our eyes are sensitive to only a very narrow band.
Broccoli contains a substantial amount of nutrients that are extremely good for health including vitamins A, C, folic acid, fiber and calcium. This cruciferous vegetable has also become popular because of its ability to offer the following health benefits: 1. Prevents cancer. Broccoli is rich in glucoraphanin which can be processed by the human body into a kind of compound capable of preventing cancer.
Broccoli provides many such flavonoids in significant amounts, including the flavonoids kaempferol and quercitin. Also concentrated in broccoli are the carotenoids lutein, zeaxanthin, and beta-carotene. All three of these carotenoids function as key antioxidants.ecent studies have also provided us with a much better idea about the amount of broccoli that we need to lower our cancer risk. At the lower end of the spectrum, it looks like an average of 1/2 cup of broccoli per dayâonly 22 calories' worth of broccoli!âis enough to provide some measurable benefits.