Prism to Make Rainbow?
I have a triangular prism to attempt to make a rainbow for photography purposes. The studio I use has no sunlight so I can't use the light from the sun to create the rainbow. Light from my LED lights and my iPhone do not create the rainbow effect. I was wondering what light source I could use to create the rainbow effect?
Even if you get a right light… Any white light should work with enough focus… But even if you get the right luight how do yo plan on photographic it?
Even sunlight will not produce a rainbow if the sky is cloudy. First you will need a light with no frosted covering - a clear bulb. Even then, most artificial light sources do not have a full spectrum of wavelengths, even if they look white to the eye.
I suggest you go to a lamp store and see what they can tell you. A full spectrum light bulb, if it is not frosted, might work - but try it before you buy it, as these are not cheap.
Why not just go outside and create a set onto which to photograph the prism? Light from the Sun is free, while a full-spectrum light bulb is not.
With a prism you will get a "straight" representation of the colours of the visible spectrum. You will not get a nice semi-circular bow.
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