When bombarded with visible light, the chlorophyll molecule readily absorbs ligh
ID: 582870 • Letter: W
Question
When bombarded with visible light, the chlorophyll molecule readily absorbs light with wave length of 465 (cyan) and 665 (red). The reason for this is:
A. All other frequencies destructively interfere with each other near the molecule
B. Chlorophyll natural oscillates with a frequency that matches cyan and red light
C. Cyan and red constructively interfere with the chlorophyll molecule
D. Chlorophyll naturally resonates with green light, which is why it appears green.
Blowing across a tube open at both ends produces a musical note. If you place your finger over the open end at the bottom of the tube and blow across the top of the tube, a second note is produced. Compare the pitch and frequency of the second note to the pitch and frequency of the original note
A. The second note has a higher pitch and twice the frequency
B. The second note has a higher pitch and half the frequency
C. The second note has a lower pitch and twice the frequency
D. The second note has a lower pitch and half the frequency
Explanation / Answer
1.
Answer:
B. Chlorophyll natural oscillates with a frequency that matches cyan and red light
A molecule absorbs light of matching frequancy matching to frequancy of oscillation
2.
for open pipe: f = V/2*L
for close pipe: f = V/4*L
So frequancy decreases by half
decrease in frequancy causes decrease in pitch
Answer:
D. The second note has a lower pitch and half the frequency
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