Two fast friends named Sita and Gita spend most of the time with each other. One day Gita observed that Sita is having pain in gums while eating her school lunch. Gita' father is a dentist so she advised, Sita to come with her to her father' clinic. Gita' father examines Sita' mouth and teeth with the help of a mirror and light and advises her not to eat too many chocolates and soft drinks. She also starts taking care of her mouth as she washed her mouth properly after having every food and also started taking a calcium rich diet.
(i) Which type of mirror is used by the dentist ?
(ii) Name the phenomenon of light by which doctor is able to examine Sita.
(iii) What values are shown by doctor, his daughter and his daughter'* friend ?
