Lab 12 Reflection and refraction


On Wednesday I tested out red food color in the water. The laser beam remained invisible. The theory that red water scatters red light did not apply in this case. I once again moved the mirror to the front of the class, but this might not have really helped.


The set up.


The left board.


The right board. I really must work on the rainbow color order.

Early morning setup
A poster pad provided some dampening of the surface reflection.
Sandpaper blocked the direct view which, if left unblocked, confuses students. Opaque containers might perform better.
Meyer sticks along with sandpaper were almost forgotten this term.

Boards took 21 minutes to layout in the morning session.


Kaylem and Jasen

Brenda, Shirlyann, and Harriet

Jasen working on reflection with Kaylem

Shirlyann enters data into Desmos on her cell phone
Magarette, Lomalinda, and Hedweag work on reflection measurements

Margarette and Lomalinda

Jasen estimates the location of the penny image in an apparent depth determination of the index of refraction for water

Brenda working on apparent depth

Shirlyann measures the apparent depth of a penny as located by Brenda. Hedweag, working with Lomalinda and Margarette, is locating the apparent depth of a penny in a graduated cylinder filled with a different amount of water. 

Harriet records data values

Brenda locating a penny. Photos are not chronological. 

Leila Marie records reflection data taken by Mahea Lani. 

Mahea reads out the object distance.

Lisa Praise works with Joyleen on object versus image distance in a plane mirror. 

Behind Joyleen, Lilly Rose assists. 

Leila Marie locates the apparent depth of a penny

Joyleen works on the apparent depth of a penny

Mesenda, Joyleen, Mahea


The smaller beakers are more challenging for everyone. Lisa Praise makes measurements while Lilly Rose records the measurements. 

Lilly Rose, Lisa Praise, Mesenda

Mahea measures apparent depth

The right board at class end

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