Question 18M.3.SL.TZ2.2c
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.SL.TZ2.2c |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Explain | Question number | c | Adapted from | N/A |
A student carries out an experiment to determine the variation of intensity of the light with distance from a point light source. The light source is at the centre of a transparent spherical cover of radius C. The student measures the distance x from the surface of the cover to a sensor that measures the intensity I of the light.
The light source emits radiation with a constant power P and all of this radiation is transmitted through the cover. The relationship between I and x is given by
Explain the disadvantage that a graph of I versus has for the analysis in (b)(i) and (b)(ii).
[2]
this graph will be a curve / not be a straight line
more difficult to determine value of K
OR
more difficult to determine value of C
OR
suitable mathematical argument
OWTTE
[2 marks]
