In case of reflection and refraction of electromagnetic radiation ?

Related Mcqs:

1. Which one of the following statement is incorrect regarding the electromagnetic radiation ?

   A. These are produced by the motion of electric charge
   B. The oscillation of charged particles sets up changing electric fields
   C. The changing electric fields induce the changing magnetic fields in the surrounding medium
   D. None of these

2. 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°

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 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

5. 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

6. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target_________________?

   A. Reduces the contrast of the image and also its sharpness
   B. Increases the contrast of the image but reduces the sharpness
   C. Increases both the contrast and sharpness
   D. Reduces the contrast but increases the sharpness

7. The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared______________?

   A. Visible (0.4 –
   B. Near-IR (0.7 –
   C. Short wave-IR (1.3 –
   D. None of these

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

   A. Constant in time
   B. Constant in space
   C. Constant in time and space
   D. None of these

9. 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

10. 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