Circumpolar stars
If θ and δ be the latitude of an observer and declination of a heavenly body respectively, the upper culmination of the body will be south of zenith if its zenith distance, is
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Spring tides are caused when
A star may culminate at zenith if its declination is
A star has a declination of 55°N its upper culmination is in the zenith of the place. The altitude of the lower culmination is
A vertical photograph was taken from an aircraft flying at an altitude of 2000 m above mean sea level. The focal length of the camera is 175 mm. The scale of the photograph for a hill of an elevation of 250 m is
In an aerial photograph, if the photograph has a tilt of 3° and the focal length is 100 mm, then the distance between the perspective centre and the plumb point will be
In an aerial photograph, if the photograph has a tiit of 4° and the focal length is 200 mm, then the distance between, the principal point and plumb point will be
An aircraft is flying at a ground speed of 200 km/h. The focal length of the camera is 200 mm. The ground distance covered is 200 mm. The ground distance covered along the flight line between exposures is 2 km. The time interval between exposures is given by
Which one of the following surveys is required in observations of stars?
31 docs|280 tests
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31 docs|280 tests
|