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Saturated,Unsaturated and Supersaturated Solution

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there are certain material developed in the laboratory is which have a negative index array incident from air into such a medium shall follow up at given by

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Q. Most materials have the refractive index,

n > 1

. So, when a light ray from air enters a naturally occurring material, then by Snell's law,

\frac{sin θ_{1}}{sin θ_{2}} = \frac{n_{2}}{n_{1}}

, it is understood that the refracted ray bends towards the normal. But it never emerges on the same side of the normal as the incident ray. According to electromagnetism, the refractive index of the medium is given by the relation,

n = (\frac{c}{v}) = \pm \sqrt{ϵ_{r} μ_{r}}

c

is the speed of electromagnetic waves in vacuum,

v

its speed in the medium,

ϵ_{r}

μ_{r}

are the relative permittivity and permeability of the medium respectively. In normal materials, both

ϵ_{r}

μ_{r}

are positive, implying positive

n

for the medium. When both

ϵ_{r}

μ_{r}

are negative, one must choose the negative root of

n

. Such negative refractive index materials can now be artificially prepared and are called meta-materials. They exhibit significantly different optical behavior, without violating any physical laws. Since

n

is negative, it results in a change in the direction of propagation of the refracted light. However, similar to normal materials, the frequency of light remains unchanged upon refraction even in meta-materials.
Choose the correct statement.

OP

of a monochromatic light is incident on the face

AB

ABCD

B

at an incident angle of

60^{\circ}

as shown in figure. If the refractive index of the material of the prism is

\sqrt{3}

, which of the following is

(

)

correct?
[Assume, Prism is surrounded by air medium]

Q. The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is

Q. The graph of

sin i

sin r

for certain materials is given below. Identify the curve which is not possible for a given material. Assume the first medium to be air.
(

i

r

are angle of incidence and refraction)

Q. Electromagnetic waves emanating from a point A (in air) are incident on a rectangular block of material M and emerge from the other side as shown. The angles i and r are angles of incidence and refraction when the wave travels from air to the medium. Such paths for the rays are possible

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