The focal length of the converging lens in a computer projector is 8,0 cm. An LCD panel positioned inside the projector serves as the object for the lens. If the LCD panel is located 8.1 cm from the lens inside the projector, how far away should the screen be placed so that a clear image is produced? Write your answer in cm and do rounding up to 2 decimal places
Объяснение:
Дано:
F = 8,0 см
d = 8,1 см
f = ?
1/F = 1/d + 1/f
1/f = 1/F - 1/d
f = d·F / (d - f) = 8,1·8,0 / (8,1-8,0) = 650 см или 6,5 м