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- An image of the sun is formed by a lens of focal-length of 30 cm on the metal surface of a photo-electric cell and a photo-electric current is produced. T
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- #Dual Nature of Matter and Radiation
An image of the sun is formed by a lens of focal-length of 30 cm on the metal surface of a photo-electric cell and a photo-electric current is produced. The lens forming the image is then replaced by another of the same diameter but of focal length 15 cm. The photo-electric current in this case is
Answers (1)
Here diameter of the lens in the two cases is the same and hence energy received from the sun is the same. So, photo-electric current is same.
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