K.C.S.E Physics Q & A - MODEL 2010PP2QN05

19/7/2020

K.C.S.E Physics Q & A - MODEL 2010PP2QN05

Figure 4, shows a bright electric lamp placed behind a screen which has a hole covered with a wire gauze. A concave mirror of focal length 25cm is placed in front of the screen. The position of the mirror is adjusted until a sharp image of the gauze is formed on the screen.

Determine the distance between the mirror and the screen.

answer

Distance = 2f 2 x 25=50 cm

1 Comment

Bakari Ibrahim

17/4/2021 15:30:05

I want to learn physics

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