what do you think you know about physics, physics is the study of matter under the effect of energy, but does this includes solid states bodies, atoms at ground states, object at microscopic size or object moving faster than light? these and more is what prompt me to ask again what is physics?
what principle do all modern cameras use to form images
camera use the principle of refraction to form
images , camera are made of lens and not plane or spherical mirrors, they therefore
bend(refract) light to form images.
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