If electric permittivity and magnetic permeability of the medium are respectively $$\varepsilon $$ and $$\mu $$, then the velocity (Cm) of the electromagnetic wave in the medium is given by:
A. $${{\text{C}}_{\text{m}}} = \frac{1}{{\varepsilon \mu }}$$
B. $${{\text{C}}_{\text{m}}} = \frac{1}{{\sqrt 8 \mu }}$$
C. $${{\text{C}}_{\text{m}}} = \frac{5}{{\sqrt \varepsilon \mu }}$$
D. None of these
Answer: Option B
This Question Belongs to Civil Engineering >> Elements Of Remote Sensing
Which one of the following factors does not affect the scale of the air photographs?
A. Focal length
B. Flying height
C. Ground elevation
D. None of these
The optical property of a water body depends on:
A. Absorption by the dissolved material
B. Absorption by the suspended particulate matter
C. Scattering by the suspended particulate matter
D. All of these
The infrared portion of EMR lies between
A. 0.4 - 0.7 μm
B. 0.5 mm to 1 μm
C. 0.7 - 1.3 μm
D. 0.7 to 14 μm
The phase difference of the waves 1 and 2 at A in the given figure is:
A. $$\frac{\pi }{4}$$
B. $$\frac{\pi }{2}$$
C. $$\pi $$
D. $$\frac{{3\pi }}{2}$$
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