Answered By: Regan Brumagen
Last Updated: Apr 20, 2017     Views: 624

Thank you for contacting us with your question about glass and the visible light spectrum. The visible light spectrum is roughly between 400 and 700 nanometers. According to print and web sources the temperature a material begins to become visible on the light spectrum is around 1300. 


Also, here is a little information more general information on light and the visible spectrum from the text : Basic Optical Stress Measurement in glass by H.W. McKenzie & R.J. Hand.

Light is commonly considered to travel in the form of a wave. The product of wavelength and frequency is equal to the velocity of light which is constant equal to 3 times 10 to the 8th power (186,000 miles per second). Therefore the color of the light may be described by its frequency, which is proportionate to the inverse of the wavelength. 

Light of one particular color wavelength ( or frequency) and therefore color, is known as monochromatic and white light may be used for photo elastic analysis. The amplitude of a wave of light may also vary, and this is experienced  as changes in the intensity or brightness of light (the intensity of a light wave is proportional to the square of the amplitude).

Let me know if you have any additional questions.