There are two basic ideas in this section energy comes in discrete units called quanta can't measure anything without changing it. The resulting picture is called wave-particle duality. Energy Quantization Consider the first idea here. In the physics section, we saw that atoms could have only certain energies.
Energy is said to be quantized .
Light energy is carried in packets called photons. This is not a significant amount of energy, but if you have 6.022 x 10 of these photons, you would have 200 kJ of energy, which is a significant amount of energy. What it Says Changes caused by the act of measurement make it impossible to know everything about a particle with infinite precision. For example, seeing a book-if you read a page you are seeing light reflected off the page. The book doesn't move because of the reflected light.