11. Which one of the following frequency regions is a part of sun's radiation? A. Ultraviolet frequency region B. Infrared frequency region C. Radio frequency region D. All of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
12. The refractive index of the ocean water: A. Increases with salinity B. Increases with temperature C. Decreases with salinity D. Decreases with temperature Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
13. The changes in the reflectivity/emissivity with time, is called: A. Spectral variation B. Spatial variation C. Temporal variation D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
14. Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings). A. $${\text{h}} > \frac{\lambda }{\Delta }\cos \theta $$ B. $${\text{h}} = \frac{\lambda }{8}\cos \theta $$ C. $${\text{h}} > \frac{\lambda }{8}\cos \theta $$ D. $${\text{h}} < \frac{\lambda }{8}\cos \theta $$ Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
15. Which one of the following relationship between the wave length ($$\lambda $$) and frequency and the speed (C) of the electromagnetic wave is correct? A. $${\text{C}} = {\text{v}} + \lambda $$ B. $${\text{C}} = \frac{\lambda }{{\text{v}}}$$ C. $${\text{C}} = {\text{v}}\lambda $$ D. $${\text{C}} = \frac{1}{{{\text{v}}\lambda }}$$ Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
16. Who coined the term, ‘Remote sensing’. A. Evelyn L. Pruitt, a geographer B. Gaspard Felix Tournachon, a French scientist C. Wilbur Wright, an Italian scientist D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
17. 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 & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
18. The most widely used antenna in GPS is A. Parabolic antenna B. Microstrip antenna C. Horn antenna D. Slotted antenna Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
19. Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its A. Six ground stations B. Five ground stations C. Four ground stations D. Three ground stations Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
20. The normal altitude of GPS satellite is about A. 16,200 km B. 20,200 km C. 24,400 km D. 36,100 km Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board