Q)a)does a beam of light give a spectrum on passing through a hollow prism?Give reason b)why bees can see objects placed in ultraviolet light,whereas we as human beings cannot?
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A beam of light does not give a spectrum while passing through a hollow glass prism. The reason is that, as we know spectrum is formed due to dispersion of white light, which happens due to the phenomenon of refraction, related with the wavelengths of the different colours, that constitute the white colour. And as we know that refraction only happens if light travels from an optically denser or rarer medium to another medium which is optically opposite the other medium. But as hollow prism will have only air inside it, therefore no difference will be seen in optical density of air and the hollow prism, therefore no spectrum is formed as refraction does not takes place.
b) Bees have the special ability to detect ultraviolet rays whereas our human brain is only able to detect the lights seen on splitting the white colour, i.e the spectrum. The receptors in human brain is only adapted to receive colours of wavelength in the range of 430 - 770 HTZ and therefore is unable to view ultraviolet rays, but the receptors is a bee's eye is adapted through generations to view ultraviolet rays which helps them to detect nectar in flowers.
b) Bees have the special ability to detect ultraviolet rays whereas our human brain is only able to detect the lights seen on splitting the white colour, i.e the spectrum. The receptors in human brain is only adapted to receive colours of wavelength in the range of 430 - 770 HTZ and therefore is unable to view ultraviolet rays, but the receptors is a bee's eye is adapted through generations to view ultraviolet rays which helps them to detect nectar in flowers.
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