When a bulb is placed at the focus of a concave mirror light from the bulb gets . reflected to produce a strong, parallel beam. By using this property, dentists are able to see the inner parts of the tooth clearly.
When a bulb is placed at the focus of a concave mirror light from the bulb gets . reflected to produce a strong, parallel beam. By using this property, dentists are able to see the inner parts of the tooth clearly.