Question

Two friends Kapil and Rohit were studying in the same class.One day Rohit observed that
Kapil was having pain in his gums during lunch time.Rohith told Kapil that his father was a
dentist and asked him to visit his father’s clinic.Rohith’s father examined Kapil with a mirror and
advised him not to eat too many sweets and soft drinks.Kapil followed the advice and recovered
soon. He starts taking care of his mouth by washing regularly after every meal and by taking a
calcium rich diet.

a) Identify the type of mirror used by the dentist.
i) convex mirror ii) concave mirror iii) plane mirror iv)both i & iii
b) Name the phenomena of light by which the doctor was able to examine Kapil.
i) reflection ii) refraction iii) dispersion iv) scattering of light
c) What was the nature of the image formed in the mirror used by the dentist?
i) enlarged, real and inverted ii) real, inverted and diminished
iii) enlarged,virtual and erect iv) real, inverted and same size
d) If the focal length of the mirror used by the dentist was 15 cm.What is the radius
of curvature of the mirror?
i) +30cm ii) +15 cm iii)-15cm iv)-30cm

Answer 1

Answer:

the mirror used is concave mirror

reflection is the phenomena

it is enlarged,virtual and erect

I think so it is 30

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