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ref and reflect

 

 

A wave entering a slower medium

[ Flash ]

Is this refraction? Angle of incidence?

 

 

 

 

No. The wave is changing speed but not bending.

 

 

 

 

a) Which wave characteristic changes? stays the same?

b) How many times faster is the blue medium than yellow medium?

 

[ Flash ]

 

 

 

a) wavelength decreases in blue medium

b) frequency is the same

c) Blue medium is twice as fast

 


 

b. n and V

 

n1v1 = n2v2

1 – incident medium
2 – refractive medium

 

 

Name all the ways these waves are different.

What characteric(s) do the waves have in common?


St. Mary's Physics

[ Flash ]

 

 

Direction, Velocity, Wavelength are different

Frequency is the same

 

 

 

Waves, Refraction, Velocity, Wavelength

Slow to Fast Medium

 

 

When a light changes media, its wavelength changes NOT its frequency



c. n, λ

 

n2λ2 = n1λ1

 

 

 

 

 


When light refracts it BENDS, CHANGES SPEED and WAVELENGTH
 

 

 

 

Which medium is faster?

 

 

 

 

 

 

Top medium, has larger wavelength

 

 

Refraction and Wavelength
Don Ion

 

 

Why No Refraction?

 

 

 

Angle of incidence = 0

 

 

 

 

 

 

Ex) What is the angle of incidence?, angle of refraction?

 

 

 

 

 

0 degrees, 0 degrees

 

 

 

What's wrong with this picture?

 

 

 

 

Lower left ray is not possible

 


 

 

What is the angle of incidence and the angle of refraction?

June 2016

 

 

Total
Internal
Reflection

 

 

Enrichment

Using pins to trace the path of light
from air into glass and back into air

NOVA (PBS) explains how refraction makes diamonds sparkle

 

 

 

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