VII. Give the answer in detail
1. List any five properties of light
2. Explain the rules for obtaining images
formed by a convex lens with the help of ray
diagram
3. Differentiate the eye defects: Myopia and
Hypermetropia
4. Explain the construction and working of a
Compound Microscope.
✨explain any 2question
Answers
Answer:
1)The primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarization .
2) Rule 1: A ray of light which is originally parallel to the principal axis passes through the focus after refraction through the lens. Rule 2: A ray of light passing through the optical centre of the convex lens does not bent after refraction but goes straight.
3)The difference between myopia and hypermetropia is that a myopic person is only able to see the near or short distance objects clearly whereas a hypermetropic person is only able to see the far or distant objects clearly.
4) Construction-A compound microscope consists of two convex lenses. The lens towards the object is called an eyepiece. The lenses are so close that the focal length of the objective lens is small compared to the eyepiece. ... The piece forms a virtual,erect & magnified image A''B'' of the object.
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