What If Anything is What If Anything is Wrong Task – Wrong Task –

Absorption of Light by Absorption of Light by a Filtera Filter

A student is holding a red and A student is holding a red and a green filter in front of a a green filter in front of a bright white light. The light bright white light. The light passes through the red filter passes through the red filter first. She states:first. She states:“If I look through the red and “If I look through the red and green filter at the same time, I green filter at the same time, I will see yellow light since red will see yellow light since red and green light add together and green light add together to make yellow light.”to make yellow light.”

Answer the following Answer the following question on your ownquestion on your own

What if anything is wrong with the What if anything is wrong with the student’s statement?student’s statement?

1 2 3 4 5 N

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1.1. Nothing the statement is fineNothing the statement is fine

2.2. If you mix red and green paint If you mix red and green paint you get brown not yellowyou get brown not yellow

3.3. The light will be red since the The light will be red since the green was absorbed by the red green was absorbed by the red filterfilter

4.4. The light will be green since it The light will be green since it passes through the green filter passes through the green filter lastlast

5.5. No light will pass through that No light will pass through that combination of filters.combination of filters.

Consult with your Consult with your neighbors. Try to see if you neighbors. Try to see if you can reach a consensus and can reach a consensus and then answer againthen answer again

What if anything is wrong with the What if anything is wrong with the student’s statement?student’s statement?

1 2 3 4 5 N

othin

g the

stat

emen

t ..

If y

ou m

ix re

d an

d gre

..

The

light w

ill b

e re

d s...

The

light w

ill b

e gr

een...

No li

ght will

pas

s th

r...

0% 0% 0%0%0%

1.1. Nothing the statement is fineNothing the statement is fine

2.2. If you mix red and green paint If you mix red and green paint you get brown not yellowyou get brown not yellow

3.3. The light will be red since the The light will be red since the green was absorbed by the red green was absorbed by the red filterfilter

4.4. The light will be green since it The light will be green since it passes through the green filter passes through the green filter lastlast

5.5. No light will pass through that No light will pass through that combination of filters.combination of filters.