Questions and Answers
______ has a tendency to bend around it and not walk in a straight line – an effect known as the diffraction of ______. Then the straight-line treatment of optics using rays fails. To explain phenomena such as diffraction, ______ is thought of as a wave, the details of which you will study in higher classes. Again, at the beginning of the 20th century, it became known that the wave theory of ______ often becomes inadequate for treatment of the interaction of ______ with matter, and ______ often behaves somewhat like a stream of particles. This confusion about the true nature of ______ continued for some years till a modern quantum theory of ______ emerged in which ______ is neither a ‘wave’ nor a ‘particle’ – the new theory reconciles the particle properties of ______ with the wave nature.
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