Wonderful light
We see because there is light. Light falls on an object, bounces off and enters our eyes: that is how we see it. In a totally dark room nothing is visible. Light travels extremely fast. Light sources are natural: the Sun, stars, lightning, fireflies; and artificial: lamps, candles, torches, headlights. Light is also a kind of energy: it can turn into heat. Black and dark surfaces absorb more light and heat up faster; white and light surfaces reflect light and warm more slowly. That is why we wear light-coloured clothes in summer.
Experiment “Black and white paper”: put two identical ice cubes (or two identical thermometers) on white and black paper and place them in a sunny window or under a lamp. After 10 minutes which ice melted faster? Conclusion: black absorbs more light. Safety: do not look straight at the Sun or a bright lamp; wear a hat in the sun.