If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by___________________?

Related Mcqs:

1. 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.

2. “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as___________________?

   A. Fresnel reflection
   B. Fresnel refraction
   C. Snell’s law
   D. None of these

3. 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

4. The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?

   A. 10-10 to 106 m

   B. 10-8 to 106 m

   C. 10-10 to 1010 m

   D. 10-8 to 108 m

5. Which on speed C. of the electromagnetic wave is correct ?

   A. C = v
   B. C = /v
   C. C = v
   D. C = 1/

6. 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

7. 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

8. 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

9. 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

10. 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