i need these answer for my assignment please help me answer these questions
The object radiates lights of different wavelengths from red to violet (in the visible region of the spectrum) depending on its temperature. When these radiations pass through the red plastic sheet all wavelengths except those emitted by the red plastic sheet are absorbed by that plastic sheet. The colour of the red plastic sheet is due to its own emitted radiations which lie in the red region of the spectrum. So only those radiations are transmitted through the red plastic sheet and enter in to the eye of the observer as a result of which the object appears red.
Charcoal while while glowing becomes luminous object and emits light which has a frequency which is sensed by our eye as red . On the other hand, a ripe rambutan which is a non luminous object and opaque absorbs all light rays except some scattered light rays which are sensed by our eye as red . And hence it looks red. A plastic sheet which is also a non-luminous, but transparent object , allows only light rays that are sensed by our eye as red to pass through it and absorbs all other light rays . ========================
