Related Questions

For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through
A Isocenter
B Plumb point
C Principal point
D None of these
The scale of a vertical photograph of focal length ‘f’ taken from height of ‘H’ metres above M.S.L., at a point of reduced level ‘h’, is
A $$\frac{{\text{f}}}{{\text{H}}}$$
B $$\frac{{\text{f}}}{{{\text{H}} + {\text{h}}}}$$
C $$\frac{{\text{f}}}{{{\text{H}} - {\text{h}}}}$$
D $$\frac{{{\text{H}} - {\text{h}}}}{{\text{f}}}$$
In the following sentence the word principal' occurs three times "The principal (1) aim of the principal (2) of the college was to help build new roads to link the area's principal (3)schools" Indicate the use(s) in which the meaning of the word “Principal is ‘chief or main',
A Use (1)
B Use(2)
C Use (3)
D Both (1) & (3)
The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is
A $${\text{B}} = \frac{{{\text{bH}}}}{{\text{f}}}$$
B $${\text{B}} = \frac{{\text{f}}}{{{\text{bH}}}}$$
C $${\text{B}} = \frac{{\text{b}}}{{{\text{fH}}}}$$
D $${\text{B}} = \frac{{\text{H}}}{{{\text{bf}}}}$$
On an areial photograph, the surface of a pond appears as a circular region of radius 7/16 inch.If a distance of 1inch on the photograph correspondence to a actual distance of 2miles.Which of the following of closest estimate of actual surface of the area of pond,in square miles?
A 1.3
B 2.4
C 3.0
D 3.8
On vertical photographs, height displacement is
A Positive for points above datum
B Negative for points below datum
C Zero for points vertically below the air station
D All the above
The product of the distances of plumb point and horizon point of a vertical photograph from its principal point, is
A f2
B 2f2
C 3f2
D $$\frac{1}{2}$$f
The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is
A $$\frac{{\text{f}}}{{{\text{H}}\sec \theta }}$$
B $$\frac{{{\text{f}}\sec \theta }}{{\text{H}}}$$
C $$\frac{{\text{f}}}{{\text{H}}}$$
D $$\frac{{\text{f}}}{{{\text{H}}\cos \frac{1}{2}\theta }}$$
H উচ্চতায় অবস্থিত একটি বেলুন থেকে একটি পাথর ছেড়ে দিলে তা । উচ্চতায় অবস্থিত একটি হেলানো তনের উপর আছড়ে পড়ে। হেলানো শুলকে আঘাতের পর পাথরটির বেগ আনুভূমিক হয়। h/H এর মান কত হলে পাথরটি ভূমিকে স্পর্শ করতে সর্বোচ্চ সময় নিবে? (A stone falls from a balloon at a height of H above the ground and hits an inclined plane in its path at a height of h. After impact, the velocity of the stone becomes horizontal. What should be the value of hill so that the stone will take maximum time to reach the ground?)
A H-hh
B 12
C 32
D hH-h
E 2
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

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