Question

1)when a beam of white light is spilt into different component color when passed thought the glass of water this phenomenon is called-----
2)power of a lens -4D then it's focal length is ---
3)The pathof the light is called as ----
4)------ also know as short sightedness
5)Increase in the covering power of eye lens cause hypermetropia..☝️whether it's true or false for 5th question ..
6)Different colour light has different -----and -----
7) Hypermetropia can be correct by ____ lens.
8)Amount of light entering into the eye is controlled by___
9)If the energy of incident beam of light and scattered beam of light are same then it's called ____
Guys help me ..​

Answer 1

Answer:

1. dispersion
2. The power of a lens is a measure of its ability to produce deviation of light. A lens of short focal length produces more deviation of light than that of a lens of larger focal length. So, power of a lens is defined as the reciprocal of its focal length.
3. The path along which light travels is called a Ray.
4. Near-sightedness
5. As increasing converging power of eye lens wil make image in front of retina but in hypermetropia the image is formed behind retina. We conclude that increasing converging power will cause myopia not hypermetropia. Answer: The statement is false
6. Each colour has a different wavelength. Red has the longest wavelength, and violet has the shortest wavelength. When all the waves are seen together, they make white light. White light is actually made of all of the colours of the rainbow because it contains all wavelengths, and it is described as polychromatic lights
7. Hyperopia can be corrected by wearing glasses/contacts that contain convex lens
8. The iris opens and closes to control the amount of light entering the eye through the pupil. The pupil is the opening in the center of the iris where light enters the eye. When looking at the eye, the pupil appears black.
9. Sunlight and almost every other form of natural and artificial illumination produces light waves whose electric field vectors vibrate in all planes that are perpendicular with respect to the direction of propagation. If the electric field vectors are restricted to a single plane by filtration of the beam with specialized materials, then the light is referred to as plane or linearly polarized with respect to the direction of propagation, and all waves vibrating in a single plane are termed plane parallel or plane-polarized.

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