A converging lens produces an image four times as large a...
A converging lens produces an image four times as large as an object placed 25cm from the lens. Calculate its focal length
100cm
33cm
29cm
20cm
Correct answer is D
M = vu
v = mu = 4 x 25 = 100m
1v+1u=1f
1100+125=1f
f = 20cm
The graph above shows the expansion of water as the temperature increases from 0°C. Which of the...
Which of the following statements is an advantage of nuclear fusion over nuclear fission? ...
The diagram above illustrates a velocity-time graph. Determine the distance between X and Y. ...
Arrange the following in the order of their increasing frequency. I. Visible light II. Gamma ra...
Which of the following statements on the use of X-rays is incorrect? X-rays are used ...