According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index n2);
A. The angle of incidence is equal to the angle of refraction
B. The angle of refraction ($$\theta {\text{r}}$$) is given by $$\sin {\theta _2} = \frac{{{{\text{n}}_1}}}{{{{\text{n}}_2}}}\sin {\theta _{\text{i}}}$$
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer: Option B
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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