The average Benchmark Human Services monthly salary ranges from approximately $1,500 per month for Licensed Practical Nurse to $1,500 per month for Licensed Practical Nurse.Salary information comes from 67 data points collected directly from employees, users, and jobs on Indeed.he average Benchmark Human Services monthly salary ranges from approximately $1,500 per month for Licensed Practical Nurse to $1,500 per month for Licensed Practical Nurse.
In a vacuum, all electromagnetic waves travel at approximately 3 x 108 m/s - the fastest speed possible. When electromagnetic waves travel through matter (for example, light through air or glass), they travel a bit slower than this but rarely less than half as fast as in a vacuum. The value for light travelling through an optical fibre, for example, is taken as 2 x 108 m/s.
That means that 5 x 1014 wave peaks pass a given point every second. Light has a constant speed through a given substance. For example, it always travels at a speed of approximately 3 x 108 metres per second in a vacuum. This is actually the speed that all electromagnetic radiation travels - not just visible light. There is a simple relationship between the wavelength and frequency of a particular colour of light and the speed of light: