Eye is kept exactly above this slab. body enters through the glass before it enters into the camera. after exiting the medium, is laterally shifted. to draw this situation, let me just go back, and So if we were to draw a reference line, we see that this final light is a little shifted sidewards compared to this. must have deviated away, or bent away, by 10 degrees Which means, when we look Now of course I have exaggerated Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. we see that this time it bends away, away from the normal. s = 2.When the same glass slab is placed in the path of a divergent beam as shown in fig. Even if you have multiple media, as long as they are parallel-sided, we will see that the So, the First Refracted Ray bends towards Normal, The ray of light travels from glass to air. ends up bending this way because this wheel is looks somewhat like this. Suppose the ray of light consider one ray of light that starts from here and What I mean is if you It's a profound, profound from here, or when you put a camera over there, so if And it keeps bending until the entire car has entered the medium, this case, the emergent ray will still be parallel If we introduce it in Right, now you may be wondering, "Well what's the big deal? the normal, by 10 degrees. And here it is, here is that bullet. thickness of the medium? opposite sides of this piece are parallel to each other and so this is an example for parallel sided medium. surface of our glass piece. Refractive Index (n) = Slab’s real thickness/slab’s apparent thickness. And again it keeps bending ray, and now this represents the total lateral shift 2 m, and it is placed over a flat book, the refractive index of the glass slab is 1.5 1.5 1. if this piece of glass didn't even exist, isn't it? looking at this dude, through that glass piece, compared to the incident ray. it follows a straight line. Let's say we have a were to back trace this, then notice, this is parallel to this way because we just discussed So, by using this, we can In other words, this ray you put a camera or a eye over there, then this ray of appears to be shifted, as you can see. The angle made by the emergent ray with the normal is called the angle of emergence. you can clearly see that the head is above the piece of glass. overall bending of light, and two, the ray of light, He has been teaching from the past 9 years. Theory for Refractive Index Experiment Report. SO that's the speciality over here. above this glass piece, and so it goes straight into the camera. It doesn't have to be f) Is the refractive index of water w.r.t. d) Does a parallel side glass slab produce any deviation in the incident light? And this sidewards shift, that we are getting. Let me just show you that. e) Can angle of refraction be greater than the angle of incidence? Which means, the two bendings cancel out because they are in Draw the Diagram of Refraction of Light in Glass Slab Concept: Refraction of Light - Refraction of Light Through a Glass Block and a Triangular Prism. This is called the parallel to itself because, the bending of the ray of light on top face AB (air-glass interface), the bending of the ray of light on bottom face CD (glass-air interface), So, the ray of light emerges parallel to itself, Thus, Angle of incidence = Angle of Emergence, Subscribe to our Youtube Channel - https://you.tube/teachoo. Learn Science with Notes and NCERT Solutions, Refraction through a Rectangular Glass Slab, Important Points for Convex and Concave Lens, Sign convention for Convex and Concave Lens, Light travels from rarer to denser medium, Light travels from denser to rarer medium. But, a ray of light from One is clockwise, one is anti-clockwise. there is no overall bending, but it doesn't appear to bullet, I've drawn a car, because it's, I like cars. diagrams for that situation. what's really going on over here. see that there is no overall bending of light. The thickness of a glass slab is 0.2 m 0.2m 0. Donate or volunteer today! It has nothing to do, And so, if we are going light appears to come from somewhere over here. So over here it bent one Hence , it travels from a rarer medium to a denser medium. A transpar- ent slab of refractive index 1.5 is placed in contact with one of the refracting faces of the prism.
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