- •Read the following words:
- •Read the following groups of words:
- •Memorize the following words and word-combinations:
- •Read and translate text 13a. While reading the text find answers to the following questions.
- •Fill in the blanks with the words given below:
- •State whether the following statement are true or false. Use only evidence from the text.
- •XIII. Match the words and word - combinations from text 13a with their corresponding definitions:
- •Annotate text 13a.
- •XVII. Retell text 13a.
- •Read text 13b and formulate the main idea of each passage.
- •Find the information concerning the following:
- •Make up a synopsis of text 13b.
- •Read text 13c and disclose the content of each of 2 problems considered in it.
- •Headline text 13c as a whole.
Read and translate text 13a. While reading the text find answers to the following questions.
What does a radar system use to identify the range, altitude, direction, or speed of objects?
What does the term "radar" mean?
How does a radar system detect the target?
What enables radar to detect objects at distances?
What contexts is radar used in?
What do electromagnetic waves scatter from?
What does radar waves scattering depend on?
Why did early radars receive a vague signal from the target?
What are the most reflective targets for short wavelengths? j. What is the radar cross section?
k. What types of polarization do radar use to detect different types of reflection? 1. Where may unwanted signals originate from? m. Where do the most important noise sources appear? n. What does clutter refer to?
Give derivatives of the following words and translate them into Ukrainian: frequent, refer, originate, reflect, type, appear, definite, detect, desire, electric, direct, nature.
Fill in the blanks with the words given below:
scatter, military vehicles, internal source, curves, corners, target, wavelength, electromagnetic waves, moving and fixed, transmitter, receiver.
Radar is a system that uses __ to identify the range, altitude, direction or
speed of both __ . objects.
Radar system has that emits radio waves reflected by the target and detected by .
A solid object in air or a vacuum will usually radio waves.
Radar absorbing material, containing resistive and magnetic substances, is used on
If the is much longer than the size of the , the target is polarized.
Short radio waves reflect from and in a way similar to glint from
a rounded piece of glass.
Signals noise is an of random variations generated by electronic components.
Find synonyms among the following words:
shape, range, detect, location, returned, distance, look for, area, reflected, form.
Find antonyms among the following words:
weak, emit, strong, unwanted, circular, absorb, desirable, linear, moving, fixed.
IX. Find in the text the appropriate word - combinations:
, . , - — шимарпй lyoiMHa, ослаоити вщоораження
радару, слабкий (невизначений) сигнал.
X. Make up sentences using the following words: