If a potato is placed on a pure paper plate which is white and unprinted and put in a microwave oven, the potato heats up but the paper plate does not. This is because:

Which one of the following types of waves are used in a Night vision apparatus?

Which one of the following is not a property of the X-rays?

Which one of the following statements about X-rays is not true ?

Which of the following rays are used in the diagnosis of intestinal diseases?

Which of the following rays/waves are used to know the growth of fetus in the womb?