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Answer:
1. The two laws followed by a beam of light traversing through two media are:
The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane.
The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. This is also known as Snell’s law of refraction.
2. 4.184 joules
3. In convex lens, the image is always formed at a point where at least two refracted light rays meet. Rule 1: A ray of light which is originally parallel to the principal axis passes through the focus after refraction through the lens.
4. (D) In all the above cases.
5. The principle of the method of mixtures states that the heat lost by a hot body is equal to the heat gained by the cold body when they are mixed together and attain the same temperature. This principle is based on the law of conservation of energy.
6. acid = (Q) pH < 7
base = (R) pH > 7
neutral = (P) pH = 7
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