Related Questions

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
The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.
A 0.38-0.78
B 0.5-50
C 100-1000
D 5-50
If the lengths of the three sides of a triangle are consecutive integers, then the smallest possible value of the sum of the lengths of the three sides is
A 9
B 7
C 6
D 12
"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
If ‘Hs’ is the significant wave height, then the average wave height and highest wave height respectively are given by
A 0.6 Hs and 1.67 Hs
B 0.6 Hs and 1.87 Hs
C 1.27 Hs and 1.87 Hs
D 1.27 Hs and 1.67 Hs
তড়িৎচুম্বকীয় বর্ণালিতে (electromagnetic spectrum) নিচের কোনটির তরঙ্গদৈর্ঘ্য সবচেয়ে বেশি?
A UV-ray
B X-ray
C TV-waves
D Infrared ray
Electromagnetic spectrum contains:
A Gamma rays (wave length -10 m)
B Ultraviolet rays (wave length -6 m)
C Infrared rays (wave length -4 m)
D All of these
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?
A Visible
B Infrared
C Ultraviolet
D X-ray
Till now, how many spans of Padma Bridge have been installed?
A 5
If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by
A $$\frac{5}{6}\left( {\frac{{\text{r}}}{{1 + {{\text{r}}^2}}}} \right){\text{M}}$$
B $$\frac{5}{6}\left( {\frac{{{{\text{r}}^2}}}{{1 + {{\text{r}}^2}}}} \right){\text{M}}$$
C $$\frac{5}{6}\left( {\frac{{{{\text{r}}^2}}}{{1 + {{\text{r}}^3}}}} \right){\text{M}}$$
D $$\frac{5}{6}\left( {\frac{{{{\text{r}}^2}}}{{1 + {{\text{r}}^4}}}} \right){\text{M}}$$

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