PIRA Classification: 6A40.34
Description: A laser tape measure is used to measure the length of a water tank, first with the laser going through air and then water. The device will display different values. The ratio of these value with give the index of refraction of water.
Special Instructions: The reading displayed is 0.1 m too long (the length of the device). For an accurate calculation, subtract 0.1 from both readings before dividing.
Condition: Ok
Setup time: 2 minutes