The difference between the reference and a sample is that the concentration of the measurable substance in the reference solution is zero. The reference tube transmits as much light as is possible with the solution you are using.
Rate this Article: The Saffir-Simpson Hurricane Scale is a 1-5 rating based on the hurricane's present intensity. This hurricane scale is used to give an estimate of the potential property damage and flooding expected along the coast from a hurricane landfall. Wind speed is the determining factor in the scale, as storm surge values are highly dependent on the slope of the continental shelf in the landfall region. Wind speeds are measured using a 1-minute average. Note:The Saffir-Simpson Hurricane Wind Scale (SSHWS) was updated in 2012 to accomodate number rounding issues.
Their new Northeast Snowfall Impact Scale, or NESIS, is being published this week in the Bulletin of the American Meteorological Society. Only post-blizzard for now The ratings are designed to assess the impact of a storm after it is over, the way the Fujita scale is used to rate tornadoes. Kocin said he can foresee a day when it might be possible to develop the blizzard scale for use in warning of coming events the way the Saffir-Simpson scale is used with hurricanes.