Coherence of two electromagnetic waves takes place if their phase difference is_________________?

Related Mcqs:

1. The coherence length over which there is a strong relationship between amplitudes is_________________?

   A. Directly proportional to the bandwidth B. Inversely proportional to the bandwidth C. The square of the bandwidth D. None of these...

2. For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is_____________?

   A. 130 km B. 230 km C. 250 km D. 500 km...

3. Critical angle of electromagnetic radiation takes place if__________________?

   A. Angle of incidence is equal to angle of refraction B. Angle of incidence is greater than the angle of refraction C. Angle of incidence is equal to 90° D. Angle of refraction is equal to 90°...

4. In case of reflection and refraction of electromagnetic radiation ?

   A. Angle of incidence = angle of refraction B. Angle of incidence = angle of reflection C. Angle of refraction = sum of the angles of incidence and refraction D. All the above...

5. Electromagnetic spectrum contains________________?

   A. Gamma rays (wave length < 10-10 m) B. Ultraviolet rays (wave length < 10-6 m) C. Infrared rays (wave length < 10 -4 m) D. All of these...

6. According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?

   A. The angle of incidence is equal to the angle of refraction B. The angle of refraction r) is given by sin i C. Both A. and B. D. Neither A. nor B....

7. Electromagnetic radiation_______________?

   A. Produces a time varying magnetic field and vice versa B. Once generated, remains self-propagating C. Is capable to travel across space D. All of these...

8. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?

   A. Sensors B. Passive sensors C. Active sensors D. None of these...

9. The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as__________________?

   A. Ozone hole B. Atmospheric window C. Ozone window D. Black hole...

10. The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called____________________?

    A. Passive remote sensing B. Active remote sensing C. Neutral remote sensing D. None of these...