A narrow-band image of the sun at a wavelength of λ=588.9nm - that of a well known solar sodium line also known as the "NaD line." The image was acquired during recent first light efforts with the VTF ...
How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...
A narrow-band image of the Sun at a wavelength of λ=588.9nm - that of a well known solar sodium line also known as the “NaD line.” The image was acquired during recent first light efforts with the VTF ...