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Stage 1
Answer 5 out of 6 questions correctly.
Light is a form of electromagnetic radiation. A light source may release, or
emit,
a single wavelength of light or many wavelengths of light. Light composed of a single wavelength is called monochromatic light. Light composed of more than one wavelength is called polychromatic light.Common light sources are polychromatic. For example, incandescent light bulbs emit white light, which is composed of all the wavelengths of light in the visible region of the electromagnetic spectrum.
Which pictures show a light source that emits polychromatic light? Select all that apply.

sunlight

desk lamp

laser pointer

barcode scanner
ref_doc_title.
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