Endoscope, used by doctors for examining the inside of a patient's stomach, works on the principle of:
a.Reflection of light
b.Dispersion of light
c.Refraction of light
d.Total internal reflection of light
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Totat internal reflection.
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Answer:
Endoscope, used by doctor for examining an inside of patient's stomach, work on principle of total internal reflection of light.
Option D
Explanation:
If light is incident at an angle which is greater than critical angle for a medium, the light gets trapped inside the Medium. The light gets reflected. Here, there is no loss of energy and light intensity. Hence, the image is more appropriately viewed.
This phenomenon is used in fibre optic cable. Fibre optic cables may also be used in endoscopes. Total internal reflection is the reason for the sparkling of diamonds.
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