Recent questions tagged refraction

A light ray enters into a medium whose refractive index varies along x-axis as $y(x) = \mu_{circ} \sqrt {1+ 0.25 x}.$ Where $\mu_0=1$.The medium is bounded by the planes $x=0,x=1\;cm$ and $y=0$ . If the ray enters at an angle $\theta=30^{\circ}$ with horizontal . Then the trajectory of light ray is

asked Feb 20, 2014 by meena.p

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A circular beam of diameter $d=2 \;cm$ falls on a plane surface of glass . The angle of incidence is $60^{\circ}$ and refractive index of glass is $ \mu=\large\frac{3}{2}$. The diameter of the refracted beam is ,

asked Feb 19, 2014 by meena.p

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A 2 cm diameter coin rests flat on the bottom of a bowl in which water is 20 cm deep $(\mu_w= \large\frac{4}{3})$. If the coin is viewed directly from above what is its apparently diameter?

asked Feb 19, 2014 by meena.p

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A plane mirror is made of glass slab $(\mu g=1.5)\;2.5\;cm$ thick and silvered on back. A point objected is placed 5 cm in front of unsilvered face of mirror. What will be the position of final image.

asked Feb 19, 2014 by meena.p

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An observer can see through a pin hole the top end of a thin rod of height h, placed as shown. The beaker height is 3 h and its radius is h. When the beaker is filled with a liquid up to a height 2h ,he can see the lower end of the rod. Then RI of liquid is .

asked Feb 19, 2014 by meena.p

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A ray of light falls on a transparent glass slab with refractive index (relative to air) of $1.62$ . The angle of incident for which the reflected and refractive rays are mutually perpendicular is :

asked Feb 19, 2014 by meena.p

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A ray of light traveling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of $45^{\circ}$ The ray undergoes total internal reflection . If n is the refractive index of medium with respect to air, select the possible value of n from following

asked Feb 18, 2014 by meena.p

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A ray of light passes through four transparent media with refractive indices $\mu_1,\mu_2,\mu_3$ of all media are parallel, If the emergent ray CD is parallel ti incident ray AB. We must have

asked Feb 18, 2014 by meena.p

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A 4 cm thick layer of water covers 6 cm thick glass slab. A coin is placed at the bottom of slab and is being observed from the air side along the normal to surface. Then the apparent position of coin surface is

asked Feb 13, 2014 by meena.p

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What should be the value of refractive index n of a glass rod placed in air, so that the light entering through the flat surface of rod does not cross the curved surface of rod.

asked Feb 12, 2014 by meena.p

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Find angle of refraction in a medium $(\mu =2)$ . If light is incident in vacuum making angle equal to twice the critical angle.

asked Feb 12, 2014 by meena.p

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Find maximum angle that can be made in glass medium $(\mu =1.5)$ if a light ray is refracted from glass to vacuum.

asked Feb 11, 2014 by meena.p

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Find lateral shift of light ray while is passes through a parallel glass slab of thickness 10 cm placed in air.The angle of incidence in air is $60^{\circ}$ and angle of refraction in glass is $45^{\circ}$

asked Feb 11, 2014 by meena.p

1 answer

A layer of oil 3 cm thick is floating on a layer of colored water 5 cm thick refractive index of colored water is $\large\frac{5}{3}$ and apparent depth of two liquids appears to be $\large\frac{36}{7}$cm. Then refractive index of oil:

asked Feb 11, 2014 by meena.p

1 answer

A fish in an aquarium approaches the left wall at a rate of $2.5 \;m/s$ observes a fly approaching it at $8 m/s$ If the refractive index of water is $(4/3)$ . Then the actual velocity of fly is

asked Feb 11, 2014 by meena.p

1 answer

Refractive index of glass with respect to water is $1.125$ . If the absolute refractive index of glass is $1.5 $ find the absolute refractive index of water.

asked Feb 11, 2014 by meena.p

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A ray of light is incident on a transparent glass slab of refractive index $1.62$ . If the reflected and refracted rays are mutually perpendiculars, what is angle of incidence?

asked Feb 11, 2014 by meena.p

1 answer

Light is incident formals on as oil at an incident angle of $30^{\circ}$ After moving through the oil -1, oil-2, and glass it exters water . If the refraction index of glass and water are 1.5 and 1.3 respectively . Then the angle which the ray makes with normal in water .

asked Feb 11, 2014 by meena.p

1 answer

Find speed of light in medium 'a' if speed of light in medium 'b' is $\large\frac{c}{3}$ where $c=$ Speed of light in vaccum and light refracts from medium 'a' to medium 'b' making $45^{\circ}$ and $60^{\circ}$ respective with normal.

asked Feb 11, 2014 by meena.p

1 answer

Find angle $\theta_a$ made by light ray when it gets refracted from water to air as shown .

asked Feb 11, 2014 by meena.p

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A light ray is incident on a glass sphere at angle of incidence $60^{\circ}$ as shown. then the total deviation after two refraction is :

asked Feb 11, 2014 by meena.p

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A ray of light passes through four transparent media with refractive indices $\mu_1, \mu_2, \mu_3$ and $\mu_4$ as shown. The surface of all media are parallel. The emerging say CD is parallel to incident ray AB, Then ,

asked Jan 24, 2014 by meena.p

1 answer

A vessel of height h is half filled with one liquid of refractive index $\mu_1 $ and upper half filled with another liquid of refractive index $\mu_2$ The apparent depth of the vessel is

asked Jan 22, 2014 by meena.p

1 answer

A coin lies at the bottom of a tank filled with two immissible liquid. Liquid 1 on top is $20\;cm$ layer thick of refractive index $\mu_1 =1.33$ and liquid 2 is $40\;cm$ thick with refractive index $\mu_2=1.46$. At what depth below the surface the coin appear?

asked Jan 22, 2014 by meena.p

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Two rays of light travel as shown.The refractive index of material is 3/2 and that of the surrounding is 4/3. What is the path difference between the two.

asked Jan 22, 2014 by meena.p

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Speed of light is maximum in

asked Jan 21, 2014 by meena.p

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A ray of light strikes a material of refractive index $\mu= \sqrt 3$. If the reflected and refracted light are perpendicular to each other, what is the angle of incidence.

asked Jan 20, 2014 by meena.p

1 answer

A luminous point is kept inside tank of water at a depth of 10 m below the surface. $\mu$ for water is $\large\frac{4}{3}$ . What must be the minimum diameter of card placed on the surface of water so that it cuts off all the light coming out.

asked Jan 20, 2014 by meena.p

1 answer

A point object is placed at the centre of a glass sphere of radius 6 and refractive index 1.5 . The distance of the virtual image from the surface of the sphere is

asked Jan 20, 2014 by meena.p

1 answer

White light is incident on the surface of glass and air as shown. Green light just grazes the surface. then the emergent ray in air contains

asked Jan 20, 2014 by meena.p

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Let ray of light given by the vector $ \overrightarrow{A}= 6 \sqrt 3 \hat i+8 \sqrt 3 \hat j -10 \hat k $ be incident on the $X-Y$ plane . Which is the boundary between two transparent medium. Medium 1 in $ Z > 0$ has refractive index of $\sqrt 2$ and medium 2 with $Z > 0$ has refractive index of $\sqrt 3 $. What is the angle of refraction in medium 2.

asked Jan 20, 2014 by meena.p

1 answer

Bottom of a water tank is silvered A point object (dust particle) is at P inside the liquid at a height of 2 m from the base. An observer seeing directly from above sees both the image and the object What is the apparent distance between the object and image $(\mu_0 =\large\frac{4}{3} ) $

asked Jan 17, 2014 by meena.p

1 answer

A light enters a transparent glass slab of refractive index $\mu=\large\frac{3}{2} $. The reflected ray and refracted ray are mutually perpendicular, The angle of incidence is

asked Jan 17, 2014 by meena.p

1 answer

The wave length of light in 1st liquid is $2500 \;\mathring{A}$, and that in 2nd liquid is $5000\; \mathring{A}$, What is the critical angle of 1st liquid with respect to 2nd liquid.

asked Jan 17, 2014 by meena.p

1 answer

A swimmer is swimming at a depth of 12 m below the surface. A bird flying in the sky appears 36 m directly above his eyes. At what height is the bird is actually flying from the surface of water

asked Jan 16, 2014 by meena.p

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Refractive index for a piece of transparent material is greatest for

asked Jan 16, 2014 by meena.p

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A ray of light travelling in glass enters glass water interface at an angle $\theta$. It finally emerges into air parallel to the surface of water. $ \mu_w=\large\frac{4}{3}$. What is the refractive index of glass.

asked Jan 16, 2014 by meena.p

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A glass slab of refractive index $1.5$ and thickness $3\;cm$ is placed on a black dot on a piece of paper. A person looks at the mark from a height of $8\; cm $ above it. The dot will appear at a distance.

asked Jan 16, 2014 by meena.p

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A ray of light is incident from air on a surface of medium at an angle of $60^{\circ}$. The angle of refraction in the medium is $ 30^{\circ}$ what will be the velocity of light in the medium.

asked Jan 16, 2014 by meena.p

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A ray of light is incident on a rectangular glass block at $45^{\circ}$ on glass- air interface. The refractive index of glass is $\sqrt 2$. Then

asked Jan 16, 2014 by meena.p

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light travels through a glass of refractive index $\mu =1.5 $ of thickness $4 mm$. What is the time taken for the light to cross it

asked Jan 16, 2014 by meena.p

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A light wave has wavelength $6000 \mathring{A}$ in vacuum. The wavelength of this light when it passes through a certain glass of refraction index $(\mu =1.5 ) $ is

asked Jan 16, 2014 by meena.p

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Wavelength of a colour of light for air is $6000\;\mathring{A}$ and in water the wavelength is $4500\;\mathring{A}$. What is the speed of light in water.

asked Jan 16, 2014 by meena.p

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