Which layer of the atmosphere reflects radio waves back to the earth’s surface?

Related Mcqs:

1. The top atmosphere of the Earth directly reflects back into space nearly what part of the total amount of sun’s energy coming to it?

   A. 10%
   B. 20%
   C. 30%
   D. 50%

   Submitted by: Jameel Ahmed Solangi (Larkana)

2. The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________?

   A. Diatonic scale
   B. Fahrenheit Scale
   C. Richter scale
   D. Celsius Scale
   E. None of these

3. Second layer of Earth’s atmosphere is__________?

   A. Stratosphere
   B. Mesosphere
   C. Troposphere
   D. Thermosphere

   Submitted by: Rehana Mallah

4. Which layer of the atmosphere lies close to the earth?

   A. Stratosphere
   B. Mesosphere
   C. Troposphere
   D. Thermosphere

   Submitted by: Ali Mallah

5. Sound waves are _________ waves.

   A. Transverse
   B. Electromagnetic
   C. Longitudinal
   D. None of these

6. P Waves are also said to be __________ waves?

   A. Push-pull
   B. Side-side
   C. Up-down
   D. None of the above

   Submitted by: Rashid Mehmood

7. Ultrasonic waves are those sound waves having frequency __________?

   A. between 20 hertz and 1000 hertz
   B. between 1000 hertz and 20000 hertz
   C. less than 20 hertz
   D. more than 20 kilohertz

   Submitted by: Habib Baloch

8. The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use ?

   A. red waves
   B. Infrared waves
   C. Ultrasonic
   D. super sonic
   E. None of these

9. Which country operated the world’s largest radio telescope Aperture Spherical Radio Telescope in September-2016?

   A. USA
   B. India
   C. China
   D. Norway

10. The ozone layer is at height of________kilometers from the surface of the Earth?

    A. 10 to 20
    B. 20 to 30
    C. 30 to 40
    D. 40 to 50

    Submitted by: ★ ɪʟʏᴀsɪʟᴜ ★