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Checking Where a Cloudy Film Sends Light 4 questions
Checking Where a Cloudy Film Sends Light
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A film spreads some light from a narrow beam into other directions. The class measures how much of the incident light comes through the film within 10° of the original direction, how much comes through beyond 45°, and how much comes through over all angles on the far side.
| Film | Within 10° (%) | Beyond 45° (%) | All transmitted (%) |
|---|---|---|---|
| P | 50 | 20 | 85 |
| Q | 50 | 2 | 55 |
Question 1
Which reading shows that more light gets through P overall?
- The within-10° reading
- The all-transmitted reading
- The beyond-45° reading by itself
- The difference in incident light
Question 2
Calculate the percent of incident light transmitted between 10° and 45° for each film.
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Question 3
The display must send at least 10% of incident light beyond 45° for a viewer standing well off to the side. A student says either film works because both send 50% nearly straight through. Use the record to evaluate the claim.
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A new receiver collects only light more than 10° and no more than 30° from the original direction.
Question 4
State the largest reading the new receiver could give for P. Explain why the table cannot predict its exact reading.
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