Words and word combinations to be remembered

unit – единица	accuracy – точность, соответствие	interrelated – взаимосвязанный
particle – частица	approximation – приближённое значение; приблизит. соответствие	reflect – отражать
field – область, сфера	quantity – количество, величина	appear – появляться
dimension – размер, величина	charge – заряд	measure – измерять
strength – сила, интенсивность, мощность	fine-structure constant – постоянная тонкой структуры	bind – связывать

Ex. 1. Translate from Russian into English:

Точная наука, упрощенная модель, фундаментальные физические постоянные, объединяющая сила, относительный, теоретический прогноз, свойство, точность, измерение, величина, множество, заряд электрона, скорость света, постоянная тонкой структуры, приближенное значение, измерять, получить, связывать, зависеть, включать в себя, появляться.

Ex. 2. Make up the word combinations using the words from 2 columns, make up some sentences with these word combinations:

Exact	relativity
Numerical	prediction
Theoretical	accuracy
Careful	constant
Solid-state	physics
Quantitative	links
Complex	science
Fine-structure	study
Great	value
Special	system

Ex. 3. Fill in the blanks:

1. A physicist is often quite pleased with himself if he measures some property of matter to an accuracy of … and finds that his measurement agrees with a theoretical prediction, again to … .

2. Most experiments deal with a complex system in which … are involved.

3. The pertinent theory usually provides only an approximation based on …

4. The speed of light in vacuum is a … physical constant important in … .

5. … is a physical constant characterizing the strength of the electromagnetic interaction.

6. … is a physical constant reflecting the sizes of energy quanta in quantum mechanics.

7. Why is it important to know the numerical values of the fundamental constants with … ?

8. The quantitative predictions of the basic theories of physics depend on …

9. If one looks at the entire structure of physics, one sees … .

10. The fundamental constants are the quantitative links that … .

Ex.4. Answer the following questions:

1. Is physics an exact science? 2. What does this comparative lack of precision arise from? 3. What fundamental physical constants do you know? 4. Why is it important to know the numerical values of the fundamental constants with great accuracy? 5. What can you say about the entire structure of physics? 6. Is there any unifying force that binds all fields of physics together? 7. The fundamental constants are the quantitative links that “binds physics together”, aren’t they?

Ex. 5. Make up all possible questions to these sentences:

1. This comparative lack of precision arises from two main sources.

2. If one looks at the entire structure of physics, one sees a vast array of apparently divergent fields.

3. The unifying force that binds all these fields together is theory.

Ex. 6. Say a few words about:

• accuracy in physics

• the comparative lack of precision

• fundamental physical constants

• the role of fundamental physical constants in physics