Physics - EM spectrum
posted by John .
Here's the question:
which part of the electromagnetic spectrum has a refractive index of 1.45 in glass?
I've attempted to tackle it with
v = frequency x wavelength
refractive index = light speed in vacuum / light speed in material
but without success...
Formulas won't help answering this question. There are some types of fused-quartz-based glass with a refractive index of 1.45 in the VISIBLE spectrum. Glass does not transmit most other parts of the EM spectrum. Howeverm glass transmits in parts of the near infrared, but with an index of less than 1.4 in most cases. It transmits in the NEAR portion of the ultraviolet with an index of 1.5 to 1.6, depending upon the glass type.