Ребята нужна с заданием! 1. Complete the text by filling in an appropriate word fro the box in each space:
of, by, which, to, the, that, an, from, be, through, on, - , when, are
The relationship 0) between light and electromagnetism was established
1). . the prominent physicist James Clerk Maxwell in the 19th century. This led 2) … electrodynamics 3) … regards electromagnetic waves, such as light, as disturbances or 'ripples' in an electromagnetic field created by the movement 4) … electrically charged particles. At the beginning of the 20th century, experiments showed 5) electromagnetic waves also had particle-like properties. The particles that make up electromagnetic radiation 6) . . called photons, Although it seems contradictory, electromagnetic waves can behave 7)… as waves or as particles depending 8) . . . the type ofexperiment that is carried out. This is known as the wave-particle duality. The wave-particle duality is one of the basic concepts of quantum theory. In quantum theory electromagnetic radiation is generated 9) subatomic particles release energy. For example, an electron in an atom that absorbs energy, eventually drop to a lower energy level and releasel 0) energy as electromagnetic radiation. This radiation can 11)… viewed as a particle or an electromagnetic wave. The range of electromagnetic wave applications is extremely wide. Radio, television, mobile phones, the Internet rely on the transmission of radio frequency waves 12)… air, space or fiber optic cables. Lasers apply light waves to record and play DVDs and audio CDs. X-ray machines are 13) . . essential tool in medicine and airport security. In science, our knowledge about the universe comes largely 14) analysis of light, radio waves and X-rays radiated by distant stars and galaxies.
1. by
2. to
3. which
4. of
5. that
6. are
7. -
8. on
9. when
10. the
11. be
12. through
13. an
14. from