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# when a ray of light travels normal to the given surface then the angle of refraction is

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### Mohammed

Guys, does anyone know the answer?

get when a ray of light travels normal to the given surface then the angle of refraction is from screen.

## Question Video: Identifying the Ray of the Greatest Refraction Angle in a Concave Lens

At which of the points 𝐴, 𝐵, 𝐶, and 𝐷 shown in the diagram is the angle of refraction greatest?

Question Video: Identifying the Ray of the Greatest Refraction Angle in a Concave Lens

Physics

At which of the points 𝐴, 𝐵, 𝐶, and 𝐷 shown in the diagram is the angle of refraction greatest?

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## How is the angle of refraction 0° if the light ray incident normal at the surface?

Answer (1 of 2): I suppose you are talking about light that hits a translucent material because you mention “refraction” and not “reflection”. The other answers are about reflection but that does not address your question. It was the 17th century Dutch scientist Christiaan Huygens who described ...

How is the angle of refraction 0° if the light ray incident normal at the surface?

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Rogier van der Heide

25 years of lighting design world wide.Author has 520 answers and 1.5M answer views4y

I suppose you are talking about light that hits a translucent material because you mention “refraction” and not “reflection”. The other answers are about reflection but that does not address your question.

It was the 17th century Dutch scientist Christiaan Huygens who described a way to understand why light bends when it enters a medium of a different density from the medium it came from (for example, light that has been travelling through air enters glass). Huygens considered light as waves, and explained that when the material through which the light travels increases density, the waves get s

Related questions

In which case are the angle of incident and the angle of refraction the same?

When a light ray is incident on a liquid surface at an angle of 90 degrees with the normal, does reflection or refraction take place?

What will be the angle f refraction for the light ray ban incident normal to the surface of medium?

A ray of light incident normally on the surface of water. What will be the angle of refraction in water?

When a ray is incident normal to surface what is the angle of refraction and deviation?

Mihai Surdu

Because the angle of refraction (as the angles of incidence or reflex) is measured towards the normal to the surface.

A light ray perpendicular to the surface of incidence is parallel to the normal at surface, hence the angle is 0.

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Gary Sales

Works at University of Massachusetts, LowellAuthor has 460 answers and 570K answer views4y

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If a light ray does not undergo refraction at the boundary between two transparent media, what is its angle of incidence?

WE can calculate the angle of refraction using Snell’s law.

Gurusubrahmanyam K

MBBS from Government Villupuram Medical College,Villupuram (Expected 2024)Author has 54 answers and 84.9K answer views4y

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A Ray of light travelling through red medium is incident at very small angle on a glass slab and after refraction its velocity is reduced by 20 percentage the angle of deviation is?

By Snell's law , n sin¢ is constant for the pair of media.

Since i is very small , sin i =i

Refractive index of first medium =1

Refractive index (n) = c/v .

Velocity of light in medium 1 =v and medium 2 = 4/5 v

Therefore refractive index of glass slab = 5/4 .

Therefore , sin i(1)= sin r (n) where n is refractive index of glass slab .

r=4i/5 . Deviation = i/5 Dave Benson

trying to make maths easy.Author has 3.6K answers and 729.2K answer views1y

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A light ray of wavelength 589 nm traveling through air is incident on a smooth, flat slab of crown glass at an angle of 30° to the normal. What is the angle of refraction?

Refractive index of Borosilicate Crown Glass for 589nm yellow = 1.51124.

Snells law.

Refractive index, n = sine∠incidence(i) divided by sine ∠refraction(r)

∠r = sin⁻¹{sin(30)/1.51124}

Rough check sin(30) = 1/2 and Crown glass n ≈ 3/2 & ∠r ≈ sin⁻¹(1/3) ≈ 19.47º.

Avanish Student7y Related

When light Ray in refraction falls normal to the surface, then why doesn't it deviate (I hope deviation is not related to angle of incidence)?

It actually depends on angle of incidence but before that we must know why it deviates? why light bends when it travels from one medium to the other? to know the answer for this question.

why refraction? why direction of wave changes?

You can explain this using the Principle of least action or equivalently Fermat's principle. If you want light to get from place A to place B it will take the fastest route. As the speeds differ in the two different medium the fastest route turns out to be one with an bend at the boundary.

Fermat's principle of least time tells us that light always takes the pat

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Gopal Menon

B Tech in Chemical Engineering, Indian Institute of Technology, Bombay (IITB) (Graduated 1975)Author has 10.2K answers and 10.6M answer views4y

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If a ray of light traveling through the air strikes a glass slab at an angle of 60°, what is the angle of refraction?

When you say $“$strikes a glass slab at an angle of $60^o$" it means that the angle between the glass slab and the ray of light is $60^o.$

$\Rightarrow\qquad$ The angle of incidence is $90^o-60^o=30^o.$

$\Rightarrow\qquad \sin r=\frac{\sin i}{\mu},$ where $r,i$ and $\mu$ are the angle of refraction, angle of incidence and the refractive index of glass, respectively.

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## When a ray of light enters a medium of refractive index mu from air. It is observed that the angle of refraction is half the angle of incidence. The angle of incidence is :

Click here👆to get an answer to your question ✍️ 39. When a light ray enters a refracting medium, it is found that the magnitude of the angle of refraction is equal to half the angle of reflection. If n is the refractive index of the medium, then the angle of incidence is: (a) 2 sin - (n/2) (b) 2 cos (n/2) (c) cos - (n/2) (d) sin (n/2)

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## 39. When a light ray enters a refracting medium, it is found that the magnitude of the angle of refraction is equal to half the angle of reflection. If n is the refractive index of the medium, then the angle of incidence is: (a) 2 sin - (n/2) (b) 2 cos (n/2) (c) cos - (n/2) (d) sin (n/2)

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Updated on : 2022-09-05

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