Related Questions

The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb 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 $$\frac{{\text{f}}}{{{\text{H}}\cos \frac{1}{2}\theta }}$$
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)
If ‘f’ is the focal length of the camera lens and ‘θ’ is the angle of tilt, the distance of the plumb point from the principal point will be
A f sin θ
B f cos θ
C f tan θ
D f sec θ
A triangle has a base x and an altitude y. A second triangle has a base twice the altitude of the first triangle, and an altitude twice the base of the first triangle. What is the area of the second triangle?
A 2xy
B 0.5xy
C 0.66xy
D 4xy
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 orthogonal projection of the perspective centre on a tilted photograph, is called
A Nadir
B Isocenter
C Principal point
D Plumb point
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 $${\text{B}} = \frac{{\text{H}}}{{{\text{bf}}}}$$
পাত-দূরত্ব d এবং ধারকত্ব C. এমন একটি সমান্তরাল পাত ধারকের পাত দুটির মাঝখানে d/2 পুরুত্ববিশিষ্ট একটি ধাতব পাত স্থাপন করা হলো। নতুন ধারকত্ব কত হবে? (A metal plate of thickness d/2 is inserted between the plates of a parallel plate capacitor with plate separation d and capacitance C. What is the new capacitance?)
A C/d
B C/2
C 4Cd
D 2c

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