ShmoopTube

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Thank you three weeks and here's your shmoop do you

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sure brought to you by light waves Because without him

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the world would be a much darker place on this

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whole video thing Well it really wouldn't work very well

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with it All right which of the following scenarios is

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the least Disperse ihe ve of light All objects have

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the same refractive index and hear The potential answers are

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Art least disperse It means light's going to go through

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and basically stay on the same path All right Well

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let's go get a drink of water These physics things

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or making us thirsty Important clear glass and drink through

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a straw before we take a drink Though let's look

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at the straw The portion of the straw that's under

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water looks like it's in a different position in the

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portion that's above water magic Well that's because the light

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reflecting back to us from the straw under the water

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is going through glass and water before hitting our eyes

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Those materials bend the light so it hits our eye

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at a different angle than the light from the upper

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portion of the straw So it looks like the straws

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bent or broken But when we take a sip of

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that straw works just fine So refreshing All right When

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light goes through a medium with a higher refractive index

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and air which is pretty much everything the lightwaves bend

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because the material they travel through slows them down The

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angle of the bend depends on the type of material

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But if the light hits the surface of something that's

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already at an angle like a triangular prism resulting bend

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will be larger than if it hit the surface head

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on And the same thing happens when light exits something

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like glass it ben's as it moves from one material

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to the other Yeah but it's angle when it exits

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also depends on the angle of the material Well those

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changes in the angle of lighter called angular dispersion who

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five dollar word since a square object has parallel sides

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angles on entrance and exit are minimized and since it

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also has perpendicular sides the right angles of the square

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minimized dispersion for internally reflected light waves So the correct

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answer is d and there we have it We can

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see the solution with our own two eyes Well kind

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of eyes need a little help with the angle of

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refraction there And then we left our glasses somewhere So

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likes a bit blurry right now but we think we

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left him over in the all right Yeah i found 00:02:21.66 --> [endTime] him

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