A student investigated how the rate of photosynthesis in hornwort (Ceratophyllum demersum) is affected by light intensity.
The student measured the rate of photosynthesis by counting the number of oxygen bubbles released per minute at various distances from a light source. The results are recorded in the table below.
| Distance (ddd) of lamp from plant (cm) | Light intensity (arbitrary units) | Number of bubbles produced in 1 minute |
|---|---|---|
| 16 | 0.00391 | 68 |
| 24 | 0.00174 | 34 |
| 32 | 19 | |
| 40 | 0.00063 | 11 |
| 48 | 0.00043 | 6 |
Calculate the light intensity when the lamp is 32 cm from the hornwort plant.
Use the formula:
Light intensity=1d2 \text{Light intensity} = \frac{1}{d^2} Light intensity=d21Give your answer to 5 decimal places.
