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They correct the path of the light entering the eye so that it will focus a sharp image on the retina.
A nearsighted person's eye is typically longer than average or has a cornea that is too steep. This causes light entering the eye to focus in front of the retina instead of directly on it, resulting in blurry distance vision. Nearsightedness can be corrected with glasses, contact lenses, or refractive surgery.
Adjusting the diaphragm adjusts the amount of light entering the objective.
If the pupil of the eye did not work, than your eye could not regulate light entering it.
When they are entering a concave lens they are refracted and bend away from each other.
When they are entering a concave lens they are refracted and bend away from each other.
The lens are the first thing that light touches when entering the camera.
the diaphragm controls the amount of light entering the microscope
When light changes from traveling in one medium to another, it will 'bend' or refract. However, water and your eye basically have the same refractive index, so the light will barely bend (unlike in air.) Your lens can't properly compensate for the lack of the refraction, so a normal person would become more farsighted, a farsighted person would become even more farsighted. However, a severely nearsighted person would get closer to normal as their eye defects compensate more for the lack of refraction.
A yellow light is a caution light. Therefore the person who is making the left turn is entering into traffic and is the one at fault.
Light does not pass through a glass of milk. The glass is transparent, so the light will be refracted a bit when entering the glass, and again while leaving the glass, but milk itself is opaque. Light would be absorbed in the milk, and converted into heat.
oyou get poisened and being light headed