General Science | Physics | Wave Motion

General Science | Physics | Wave Motion

Dec 29, 2024 - 14:29 Updated: Dec 29, 2024 - 14:39
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1. Which of the following atmospheric layers is responsible for the deflection of radio waves?

Troposphere
Stratosphere
Mesosphere
Ionosphere

2. Which waves cannot be transmitted through vacuum?

Light
Heat
Sound
Electromagnetic

3. Long radio waves are reflected by which of the following layer of Earth's surface?

Troposphere
Ionosphere
Tropopause
Stratosphere

4. Wireless communication is reflected back to the Earth's surface by the

Troposphere
Stratosphere
Ionosphere
Exosphere

5. Cosmic rays

are charged particles
are uncharged particles
can be charged as well as uncharged
None of the above

6. Which one of the following statements is not true about cosmic rays?

They are electromagnetic waves
They have very short wavelength
They are made of highly energetic charged particles
They originate from the Sun

7. What is the distance between two successive crests or successive troughs called?

Amplitude
Wavelength
Frequency
None of these

8. Which one of the following is used for determining the structure of crystal?

Gamma rays
X-rays
UV rays
Visible lights

9. Which of the the following is a mechanical wave?

Radio waves
X-rays
Light waves
Sound waves

10. A radar which detects the presence of an enemy aircraft uses

Light waves
Radio waves
Sound waves
Ultrasound waves

11. Which one of the following types of waves are used in a Night Vision apparatus?

Radio waves
Micro waves
Infra-red waves
None of the above

12. Waves used for telecommunication are

Visible light
Infrared
Ultraviolet
Microwave

13. FM broadcasting service uses the range of frequency bands between

109-139 MHz
54-75 MHz
76-87 MHz
88-108 MHz

14. Following rays are used in the diagnosis of intestinal diseases

X-rays
α-rays
β-rays
γ-rays

15. CT scan is done by using

Infra-red Rays
Ultrasonic Waves
Visible Light
X-Rays