PSci_Wk5

Physical Science

​2Q Wk5

CJ Cabales

How light acts as a wave and a particle

Multiple Choice

What phenomenon makes white light separate into its constituent spectrum of colors?

• diffraction

• dispersion

• interference

• reflection

​When does dispersion of white light happen?

​When does dispersion of white light happen?

**Light refracts when it passes from one medium to another.

(​medium)

Question Time​

Ready?​

Multiple Choice

What color is least bent when dispersion happens?

• blue

• teal

• yellow

• red

• indigo

**Light refracts when it passes from one medium to another.

​Most bent = violet

​Least bent = red

**Light refracts when it passes from one medium to another.

​Most bent = violet

​Least bent = red

Violet

• shortest ​wavelength (in visible light) = slowed more = most bent

• ​higher index of refraction

**Light refracts when it passes from one medium to another.

​Most bent = violet

​Least bent = red

Violet

• shortest ​wavelength (in visible light) = slowed more = most bent

• ​higher index of refraction

​Red

• longest wavelength (in visible light) ​= slowed a little = least bent

• ​lower index of refraction

​

​What is dispersion?

• the phenomenon when the different wavelengths of light are bent at slightly different angles when light is refracted

Question Time​

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Multiple Choice

Who discovered that white light is made up of different colors?

• Aristotle

• Galileo

• Goethe

• Newton

Question Time​

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Multiple Choice

What phenomenon is shown here?

• dispersion

• interference

• reflection

• scattering

​http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/scattercon.html#c1

​What is scattering?

​What is scattering?

• the phenomenon in which light rays get deviated from its straight path on striking an obstacle

​Scattering of white light

Question Time​

Ready?​

Multiple Choice

Which wavelength of the visible light (color) is scattered more?

• blue

• green

• yellow

• red

​

​video scattering

​https://science.howstuffworks.com/nature/climate-weather/atmospheric/question41.htm

​

​

​video 2 scattering

​

​https://www.youtube.com/watch?v=VGMnztltVh0

​

Question Time​

Ready?​

Multiple Select

What phenomena are shown?

• diffraction

• dispersion

• reflection

• refraction

What now?​

What connections were you able to make about the things that you learned about light?

​Sources:

• ​https://brilliant.org/wiki/dispersion-and-scattering-of-light/#applications-and-natural-phenomena

• ​https://science.howstuffworks.com/nature/climate-weather/atmospheric/question41.htm

• ​https://library.si.edu/exhibition/color-in-a-new-light/science

• ​https://www.ck12.org/c/physics/diffraction-gratings/lesson/Diffraction-Gratings-PHYS/

• ​https://www.showmethephysics.com/home/notes/waves/Dispersion.htm

  ​https://www.vedantu.com/question-answer/meant-by-scattering-of-light-use-this-phenomenon-class-12-physics-cbse-5f57349f68d6b37d164f20c0

• ​Basic Prism gizmo