Modelling Bending Light

7/31/2019 Modelling Bending Light

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TRUTH OR TRICKS ?

REFRACTION(modelling)

Prepared by

UMMMU AIMAN BT ABDULLAHD20091035104

SITI MARDIAH BT MOHD BAHARID20091035103


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Scientific Concept

Scientific Concept

Refrac

tion of light is the bending of a light rays at the boundary as the rays travel from one medium

to another.

Light rays bends towards the normal and bend way from the normal based on the density ofmedium.

When light rays travels from one medium to another, its speed changes. The change in speed of thelight ray cause the change of its direction.

Refractive indexspeed of lights in the air or vacuum

n= _____________________________speed of lights in the medium

speed of vacuum= 3.0 x 108 ms-1


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ENGAGE

Did you know what makes the stars twinkle?


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EMPOWER

Types andrefraction index ofmedium A

Type andrefractive index of

medium BWavelenght of light
http://e/NOTA%20ICT/modelling-bending%20light/bending-light_en.jarhttp://e/NOTA%20ICT/modelling-bending%20light/bending-light_en.jar


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Light Intensity


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Emergent ray


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Speed of light


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DISCUSSION

1. Explain how light bends at the interface between two media and what determinesthe angle.

2. What happened to the ray when moves from less dense medium to denser

medium and instead.

3. What the refractive index for different substance.

4. Give the other phenomenon which show the effects of refraction.


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ENHANCE

Pasir putih a child aged 12 died by suffocated in a river when playing with his friend.According to witness (his friend), victim want to bath when he discovered that river isshallow and not deep. After jump into to river, victim just realized the river is deep andhe tried to a ask help but unfortunately everything was late. Explain why the victim saw

the river is shallow?


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ANSWER

This is because maybe victim see the any object like pebbles lying a the bottom of water river appear to becloser and raised up above actual position. so, this resulting the victim discovered the river is shallowerthan similarly to the situation of the object.

In fact,the observer see the object closer than their real depth to the surface. The ray coming from the fishreaches the observers eye after refraction. Thus, observer sees the image of the fish at the apparent

depth and not at actual depth .These are all results of the refraction of light which caused by differentmedium..


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UNIQUE FEATURES OF THIS ACTIVITY

FEATURES

Two manipulated variable : angleof incidence and materials ofmedium

Two responding variable : angle ofrefraction, light intensity andspeed of light

Students able to control thevariable based on theircreativity

Teacher able to enhance thestudent understanding via theusing many tools.Student can demonstrate the science process skill by

observing, measuring and analyzing.


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Attachments

bending-light_en.jar

Modelling Bending Light

Documents

Transcript of Modelling Bending Light