| water_n {photobiologyFilters} | R Documentation |
Refractive index of water
Description
The refractive index, usually abbreviated as n varies with temperature
and wavelength.
Usage
water_n(temperature = 20, w.length = 540, type = "freshwater")
Arguments
temperature |
numeric Water temperature in degrees Celcius (C) |
w.length |
numeric Wavelength in nanometres (nm) |
type |
character One of "freshwater" or "seawater". |
Details
Function 'n.water()' implements the function proposed by Parrish for
approximation of n for freshwater and seawater. The function is valid
for wavelengths from 400 nm to 700 nm, and for temperatures from 0 C to 30 C.
The function is vectorized.
References
Chris Parrish (2020) Index of Refraction of Seawater and Freshwater as a Function of Wavelength and Temperature. https://research.engr.oregonstate.edu/parrish/index-refraction-seawater-and-freshwater-function-wavelength-and-temperature
See Also
For other materials see refractive_index.mspct and to
compute reflectance from n see Rfr_from_n.
Examples
water_n(w.length = (40:70)*10)
water_n(temperature = seq(0, 30, by = 5))