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Prism formula | Derivation of prism formula Prism formula | Derivation of prism formula :- As we have seen in article Condition for minimum deviation in a prism, in case of minimum deviation, i1 = i2 = i (let) and r1 = r2 = r (let) Now as , so in case of minimum deviation,…
Condition for minimum deviation in a prism Condition for minimum deviation in a prism :- The angle of deviation of a light ray, while passing through a prism is given by : Here, cannot be negative and A cannot be zero, hence for deviation(δ) to be minimum, we have, It means in case of…
Deviation produced by thin prism Deviation produced by thin prism :- A prism with small angle of prism(refracting angle or apex angle) A ≤ 10°, is called a thin prism. Thin prisms introduce small angular beam deviations(δ) and this deviation is approximately independent of the angle of incidence. Considering the figure of previous article…
Refraction of light through a prism Refraction of light through a prism :- Consider a monochromatic light ray PQ incident on the face AB of prism ABC of angle of prism A and refractive index μ. Let PQ = incident ray QR = refracted ray RS = emergent ray A = Angle of prism i1…
Prism Prism :- Any transparent medium bounded by any number of surfaces such that the surface on which light is incident and the surface from which light emerges are plane and not parallel is called a prism. Angle of prism/Refracting angle of prism The angle between the faces on which light is incident and from…
Find the length of the optical path two media in contact of length d1 and d2 of refractive indices μ1 and μ2 respectively : Question : Find the length of the optical path two media in contact of length d1 and d2 of refractive indices μ1 and μ2 respectively : (a) (b) (c) (d) Solution : Optical path length is the distance travelled by light in vacuum in the same…
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The image of point P when viewed from top of the slabs will be : Question : The image of point P when viewed from top of the slabs will be : (a) 2.0 cm above P (b) 1.5 cm above P (c) 2.0 cm below P (d) 1 cm above P Solution : First method : Using the…
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Field of View of a Mirror Field of View of a mirror :- The field of view of a mirror refers to the extent of the surrounding environment that can be viewed through the mirror. It is the region where diverging rays from an object or an image are present. We can see an…
Object and Image Object and Image :- In Optics for a mirror object and image, both can be real or virtual. Object :- Source of light is known as object. Real Object :- A point from which light rays are actually emitted and fall on a mirror(or any reflecting/refracting surface) is said to be…
Rules for image formation by concave mirror/convex mirror Rules for image formation by concave mirror/convex mirror :- The image is formed at the point where any two of the following four reflected rays meet or appear to meet/diverge after reflection from the spherical mirror. When the rays actually meet, a real image is formed…
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