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A 4.5 cm needle is placed …

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A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm. Give the location of the image and the magnification. Describe what happens as the needle is moved farther from the mirror.

Posted by Gandamalla Charan 2 weeks, 1 day ago

CBSE > Class 10 > Science

1 answers

Devanshi Dhaka 2 weeks, 1 day ago

Magnesium ribbon reacts with oxygen present in air to farm a protective and inert layer of magnesium oxide on its surface. This layer doesn't react and also prevents the ribbon from burning. Thus it have to be rubbed with sandpaper before burning so that the layer is removed😊

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