A projection lantern is used to give the image of a slide...
A projection lantern is used to give the image of a slide on a screen. If the image is 24 times as large as the slide and the screen is 72.0m from the projecting lens, what is the position of the slide from the lens?
0.3m
3.0m
3.5m
4.0m
Correct answer is B
V = 72m
U = Magnification = 24
But Magnification = V/U
∴ 24 = 72/U
U = 72/24
U = 3.0m
On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the ...
A calibrated potentiometer is used to measure the e.m.f. of a cell because the ...
The bob of a single pendulum has a mass of 0.02kg. Determine the weight of the bob [g = 10ms-2]...
The physical properties of sound waves can best be described by ...
Which of the following is TRUE of light and sound waves? ...
Which of the following statements are true of the law of universal gravitation? ...
Which of the following graphs of a charge Q against potential difference V across the capa...