Magnification produced by a plane mirror is.........
2. A lemon placed in water appears larger in size, due to.......
3. Magnification is always......of the magnifications of the combining lenses.
4. Light bends on travelling into a different media, as its..........differ
5. As a ray of light falls normally on a glass slab, the refracting angle is........
6. The power of a lens of focal length 25cm is.......
Answers
Answer:i don't know
Explanation:
Answer:
2. When we put a lemon in a glass of water, the light rays gets refracted. This refraction causes the bending of rays and results in the diverging image. That is an object that is placed inside water will now appear diverged from its original appearance and in case of lemon it will appear bigger
3. Magnification is dependent on this formula, so it is not constant for a given lens because the distance of the object and the image will change. ... Yes it does, thus the magnification is not constant.
4. It's because of a phenomena called refraction. When a light beam travels from one medium to another, then it's velocity decreases or increases depending upon the optical density of the other medium.
5. When light falls perpendicularly or normally on the surface of a glass slab, it goes straight. There is no bending of ray of light on entering the glass slab or coming out of it. In this case angle of incidence and angle of refraction is zero.
6. The power of a lens (P) is inversely proportional to the focal length (f) and it is measured as the reciprocal of the lens's focal length. The focal length of a lens is usually measured in meters and the power of the lens is measured as Dioptre. A focal length of 1 meter gives 1 dioptre power of the lens.
( Meaning of Dioptre :a unit of refractive power, which is equal to the reciprocal of the focal length (in meters) of a given lens.)
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