Английский язык. Ч.3 (Tests 10,11,12). Ильичева Н.А - 23 стр.

   Quantum mechanics deals mainly with microscopic world of atoms and light.
But in our macroscopic world, we do perceive light and we accept that ordinary
objects are made up of atoms. This new theory must therefore also account for the
verified results of classical physics. That is, when it is applied to macroscopic
phenomena, quantum mechanics must be able to produce the old classical laws.
This, the corresponding principle is met fully by quantum mechanics. This doesn’t
mean we throw away classical theories such as Newton’s laws. In the everyday
world, the latter are far easier to apply and they give an accurate description. But
when we deal with high speeds, close to the speed of light, we must use the theory
of relativity; and when we deal with the tiny world of the atom, we use quantum
mechanics.

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                   Unit 9 – Geometric Optics. Physics Optics
1. a) Such objects as a lightbulb, a flame, a star, the Sun are seen as a source of
    light. The other objects (the Moon, a table lit by a torch in a dark room, a stage
    lit by several powerful spotlights) are seen by light reflected from them.
  b) The sense of light provides us with a large part of information about the
    world.
   c) The effects of waves – particularly sound and light waves – are all around us.
    We are aware of many of these effects, but they are such a part of our
    experience that we take them for granted. For instance, if you speak loudly to
    someone in another room, you know the person hears you. Sound waves travel
    around corners; however, visible light waves do not. You can be heard in the
    next room but not seen. Similarly, when we look up at the sky, we see a blue
    sky, white clouds and sometimes even a rainbow. These are natural
    phenomena that owe their description and understanding to the effects of
    electromagnetic waves interacting with air and water droplets in the
    atmosphere. Mirrors and lenses also are based on the wave effects of reflection
    and refraction.
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