Sunlight is made up of all the,colors of rainbow(彩虹):red, orange,yellow,green,cyan(青色), blue and violet(紫色).All of them are absorbed(吸收)and reflected(反射)when they pass through water. Water absorbs red light more than yellow,yellow more than green,and green more than blue.More blue light is reflected by water,so the sea takes on a deep blue color. Sunlight is made up of the all, colors of rainbow: red, orange, yellow, green, cyan, blue and violet. All of them are absorbed and reflected when pass through water. Water absorbs red light more than yellow, yellow more than green, and green more than blue .More blue light is reflected by water, so the sea takes on a deep blue color.