What is concave mirror preferred to a plane mirror for shaving?
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Concave mirror is preferred to a plane mirror for shaving because it magnifies the image that is, your face. As we know that in concave mirrors, the object in the mirror is larger than its actual size so therfore you can use it to see and make sure if you have done a clean cut.
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A concave mirror is preferred as a shaving mirror because it forms a magnified and erect image of the face when the mirror is brought closer to tha face. A concave lens of focal length 15 cm forms an image 10 cm from the lens. ... Object is placed at a distance of 30 cm ( negative) from the lens.
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