(a) State the two laws of reflection.
(b) What do you mean by dispersion of light?
(c) What is a blind spot?
(d) What is cataract?
(e) Define persistence of vision.
(f)What is masterbution
Answers
Answer:
a)
Explanation:
1. The angle of incidence is equal to the angle of reflection.
2. The incident ray , the reflected ray and the normal to the mirror all line in the similar plane.
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Answer:
(a) Laws of reflection are: (i) The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.
(b) Visible light, also known as white light, consists of a collection of component colors. ... Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.
(c) blind spot, small portion of the visual field of each eye that corresponds to the position of the optic disk (also known as the optic nerve head) within the retina.
(d) Clouding of the normally clear lens of the eye.
Most cataracts develop slowly over the course of years.
(e) Persistence of vision traditionally refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye.
(f) Masturbation is frequent in both sexes and at any age. Various medical and psychological benefits have been attributed to a healthy attitude toward sexual activity in general and to masturbation in particular.
Explanation:
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