شرکت در آزمون آنلاین زبان انگلیسی 1 - زبان انگلیسی 1 | آزمون شماره 12101

Poor homeless dogs can be seen everywhere walking aimlessly and without specific ……… , but there is one thing for sure that they are hungry and searching for food.

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What is color? Why do some objects look red, others green, others blue? Color is caused by

reflected light. We see color because things send back light. Something that is red reflects mostly red

light. It reflects a little green or blue light, too, but we do not see it. In the same way, a green object

sends back mostly green light. White objects reflect all colors of light. Black do not reflect any light.

What happens to the colors of light that are not reflected? They are absorbed by the objects.

The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed

is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than light-

colored clothes.

 The color of an object depends on … .