Question

When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is
A) the violet ray B) the red ray C) the green ray D) the blue ray

Answer 1

Answer:

Greater the wavelength smaller the deviation. Since the wavelength of red light is maximum, it will suffer least deviation.

Answer 2

These colors are often observed as light passes through a triangular prism. Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.

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