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Defects of vision and their correction
There is a simple relationship between the focal length F ,the object distance P and the image distance Q of a thin lens fig(1).
If F measured in mete ,then 1/F is the lens strength in diopter(D).-The focal length of a combination of tow lenses with focal length F1,and F2 is given by 1/F=1/F1+1/F2
Within the elastic region (see the graph below), there exist a between the force applied and the change in the physical state of object. Experiments have shown that the elastic beh
types of lenses and their explanation
Q. Ski Saga Problem? James Bond is skiing down a snowy slope in an attempt to run off a hostile pursuer. Unfortunately the pursuer has a speed advantage since James is only abl
A car travels along a horizontal circular curved road that has a radius of 600 m. If the speed is uniformly increased at a rate of 2000 km>h2, determine the magnitude of the accele
What are the needs of light sources for fibre optic communication? Light sources for fibre optic communication should meet certain given requirements as illustrated below: a
The least count of the stopwatch is 0.1 second because in stopwatch we can measure milliseconds also.
Infra-Red (IR) Detectors: An IR detector has an impedance of Z= (400+j200) ? . During design tests the detector current is measured as 4 µA. What is the output volta
assiament on kinametics theory of gas
Production of electricity : Very large amounts of electrical energy lie dormant in the atoms of every speck of material in the universe. Whilst the atoms remain electrically ba
Ultra violet Waves: The wavelength of ultra violet wave from 380mm down to 60nm.
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