student determine the focal length of a divided by focusing the image of a distant object on a screen placed 20 cm from the device on the same side as the object name the device and what is the focal length
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Answer:
In case of concave mirror, the image will be formed on the same side on the screen at its focus point when a object is distant.
Therefor the correct answer is the "Concave Mirror of focal length 20cm)
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Answer:
Concave mirror of focal length 20cm
Explanation:
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