While looking at her image in a cosmetic mirror, Dina notes that her face is highly magnified when she is close to the mirror, but as she backs away from the mirror, her image first becomes blurry, then disappears when she is about 30.0 cm from the mirror, and then inverts when she is beyond 30.0 cm. Based on these observations, answer the following questions about the mirror. (a) What type of mirror does Dina have? (b) What is the focal length of the mirror? (c) What is the radius of curvature of the mirror?
Applications Of Reflection Of Light
When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.
Sign Convention for Mirrors
A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.
While looking at her image in a cosmetic mirror, Dina notes that her face is highly magnified when she is close to the mirror, but as she backs away from the mirror, her image first becomes blurry, then disappears when she is about 30.0 cm from the mirror, and then inverts when she is beyond 30.0 cm. Based on these observations, answer the following questions about the mirror.
(a) What type of mirror does Dina have?
(b) What is the focal length of the mirror?
(c) What is the radius of curvature of the mirror?
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