1.) Describe what happens when incident light falls on opaque surfaces. 2.) Describe what happens when...

1.) Describe what happens when incident light falls on opaque surfaces.

2.) Describe what happens when incident light falls on semitransparent surfaces

Expert Solution

1) An opaque surface does not allow the transmission of light incident on it. Instead, the incident radiation is partially absorbed and partially reflected. The photons of the incident radiation interact with matter on the surface. This cause the vibration of the surface electrons. When they do not pass the vibrational energy down through the material, they re-emit the energy back resulting in the phenomenon of reflection. Besides, the temperature of the surface may vary in accordance with the degree of reflection which is related to its colour. Good reflectors are cooler and are brightly coloured.

Also, the incident light is partially absorbed and converted to heat by an opaque surface. And the selective absorption of different wavelengths of the visible light give rise to different colours.

2) A semitransparent surface allow some light incident on it to pass through it and the rest of the light is scattered. This type of surface diffuse the light which passes through them and attenuates the intensity of light. Frosted glass is an example of a semitransparent surface.

genius_generous answered 2 years ago

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