give the relation b/w focus and radius of curvature
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Focus is half the radius of curvature. I.e.
F= R/2
F= R/2
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The focus for a beam of incident rays parallel to the axis
The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.
The principal focus of a convex mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, diverge after reflection from the convex mirror.
Radius of curvature
Radius of curvature is the distance between center of curvature to pole of mirror or lens measured along the Principal Axis from the pole.
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The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.
The principal focus of a convex mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, diverge after reflection from the convex mirror.
Radius of curvature
Radius of curvature is the distance between center of curvature to pole of mirror or lens measured along the Principal Axis from the pole.
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Bending of light
Refraction of light occurs because light changes its velocity while entering from one medium to the other (it is faster in rarer medium and slower in the denser medium). The bending occurs because light takes the shortest path while changing its velocity (known as Fermat's theorem).
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state three law of refraction can u tell me
The law of refraction states that-
1.the incident ray,the refracted ray and the emergant ray ofof a given pair of media all lie on a same plane.
2.the ratio of sine of angle of incidence to that of sine of angle of refraction is constant to the given colour of light and given pair of media.Its also known as Snell's law ofof refraction.
1.the incident ray,the refracted ray and the emergant ray ofof a given pair of media all lie on a same plane.
2.the ratio of sine of angle of incidence to that of sine of angle of refraction is constant to the given colour of light and given pair of media.Its also known as Snell's law ofof refraction.
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