Refraction of Light

This physics video tutorial provides a basic introduction into the refraction of light. It discusses the law of reflection and the law of refraction which is also known as Snell's Law. The law of reflection states that the angle of incidence equals the angle of reflection. This video also explains how to calculate the angle of refraction as well as the critical angle that leads to total internal reflection. This video also explains how to calculate the speed of light in water. The speed of light decreases as light moves from a material with a low index of refraction to a material with a higher index of refraction.
Law of Reflection - Geometric Optics:
• Law of Reflection - Ge...
The Mirror Equation:
• Spherical Mirrors & Th...
Refraction of Light:
• Refraction of Light
Snell's Law & Index of Refraction:
• Snell's Law & Index of...
Total Internal Reflection & Critical Angle:
• Total Internal Reflect...
Thin Lens Equation:
• Thin Lens Equation, Op...
_____________________________
Ray Diagrams:
• Ray Diagrams
The Huygens Principle:
• Huygens Principle - Ph...
Young's Double Slit Experiment:
• Young's Double Slit Ex...
Single Slit Diffraction:
• Single Slit Diffractio...
Diffraction Grating Problems:
• Diffraction Grating Pr...
Polarization of Light Problems:
• Polarization of light ...
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[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/

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Thank you so much for this video, it totally helped to improve my understanding of refraction

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I was just wondering the mathematical calculations. Thanks for the video.

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Me too. Was just explaining this to my daughter, who was noticing how the appearance of her straw changed when put in a glass of water. Thought, I need to review that formula...what was it? Oh yeah, Snell's Law.

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[@AJ-ul1lt]

Thank for your videos, just one correction 1:17-1:23 The law of reflection states the angle of incidence is equal to the angle of REFLECTION not refraction. Again love all your videos!

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maybe he just pronounced it wrong, reflection and refraction are very close btw
no way he's gonna say that intentionally

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[@user-wm6od8ql3i]

so the angle with the normal and the reflected angle is called the angle of refraction, and the angle with the normal and the refracted ray is also called the angle of refraction? Are we sure thats right?

[@josephcoon5809]

Light travels the same speed regardless of the material “it” travels through.
What you are measuring is the resultant wave of multiple waves interfering with one another. Light is not a particle. It is a spherical wave front that hits electrons in a reflective material at different times. When that sphere first hits the surface, those first electrons begin to vibrate at the same frequency as that light. Vibrating charges create new wavefronts. As the original wavefronts continues on, more and more electrons begin to vibrate and they all create their own wave fronts. Where they constructively interfere, you get the reflected light. That’s also why reflected light is polarized parallel to the surface of reflection. Those valence electrons are in the conductive band which limits their vibrations along the plane of the material surface.
When a light “refracts,” it is passing between the molecules in a transparent material. This has the effect of a diffraction grating causing more and more spherical wavefronts to interfere with each other which the “refracted” ray being the resultant wave appearing at a different angle than the incident “ray.”
Just wanted to toss that out there if anybody is interested in quantum mechanics and would rather not have to unlearn a basic approximate explanation.
Good video, though.

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i dont get critical angle part

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5:44 Did you memorise all the refractive indexes?

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No the important ones like of water,air and diamonds

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I didn't understand the sin^-1(0.53166)=ፀ2 formula how did you get 32.1 after that? How to do it on calculator pls tell as

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There's sin^-1 in the scientific calculator (mine is Casio). Click shift then click sin^-1 then click 0.53166.

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[@caseylocke4474]

1:15 - I'm brand new to this so I'm trying to get the terms right. I assume you meant to say, "the angle of incidence is the same as the angle of REFLECTION," correct? Not nit-picking...I'm just learning this from scratch so I've got to make sure I understand. Thanks!

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why is the refractive index of water 1.33m

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[@forthelowpriceof4.99]

1:23 You accidentally said the angle of incidence is equal to the angle of refraction here. It is not, the angle of incidence is equal to the angle of REFLECTION.

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kindly put step by step for solutions

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the speed of light is 299792458m/s

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[@conanobrian8580]

1:20 did you mean to say angle of incidence = to angle of reflection

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10.02 my caluclator shows a diffrent angle

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Do you not know how to derive the formula...?