Physics · Explorer

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Convex lensesRunning
Optics bench. Screen distance at 50.1 cm. Lens equation 18.76 cm, Focal length 12 cm. Currently lens equation is over by 6.76 cm.TUNINGobject 30 cmf = 12 cmscreen 50.1 cm
t = 0.0s

Lens equation

18.76cm

Focal length

12cm

Lens equation is over by 6.76 cm

50.1 cm

Optics bench. Screen distance at 50.1 cm. Lens equation 18.76 cm, Focal length 12 cm. Currently lens equation is over by 6.76 cm.

What has to balance1f=1do+1di\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}

What is happening

You are called to a projector rebuilt from salvage for a night briefing.

The image on the screen is a blur. The lens has a 12 cm focal length, the slide sits 30 cm away, and the screen distance is wrong.