which coloured light bulb, red, orange, yellow, green, or blue, emits photons with (a) the least energy and (b) the greatest energy? Account for your answers.

If a color disc composed of red, orange, yellow, green, blue, indigo, and violet pie-shaped sections is rapidly rotated, which color will your eye see ?

Which of the following diode emits red and yellow light?

A source of light is emitting photons. Does all the photons emitted have the same energy? Is the source monochromatic? Explain.

A Cube is coloured on all the six faces with six different colours - black, brown, green , red, yellow, and blue • Red face is opposite to the black face • Green face is between red and black faces • Blue face is adjacent to yellow face • Brown face is adjacent to blue face • Red face is in the bottom Which of the following are adjacent to green ?

Answer true or false. An electric bulb converts heat energy into light energy

If black means white, white means red, red means yellow, yellow means blue, blue means green, green means purple and purple means orange, then what is the colour of clear sky? 1) Green 2) Purple 3) Orange 4) Yellow 5) Blue

Seven men-A, B, C, D, E, F and G are standing in a queue in that order. Eachone is wearing a cap of different colour violet, indigo, blue, green, yellow, orange and red. D is able to see in front of him green and blue, but not violet. F can see violet and yellow, but not red. G can see caps of all the colours other than orange. If E is wearing an indigo coloured cap, then the colour of the cap worn by F is

The wavelength of light in the visible region is about 390nm for violet colour, about 550nm (average wavelength) for yellow green colour and about 760nm for red colour. What are the energies of photon in eV at the (i) violet end (ii) average wavelength yellow-green colour and (iii) red end of the visible spectrum? ("Take " h=6.63xx10^(-34)Js and 1eV=1.6xx10^(-19)Js)

Given that the energy of the photons of different colours decreases in the order of VIBGYOR (Violet gt Indigo gt Blue gt Green gt Yellow gt Red ) and that if complex absorbs a photon of low energy then it shows colour of high energy photon. If an ion , M^(2+) , forms the complexes [M(H_(2)O)_(6)]^(2+),[MBr_(6)]^(4-), and [M(en)_(3)]^(2+) . The colours of the complexes, though not necessarily in order, are green, red, and blue. Match the complexes with the appropriate colour. ( Do not use the table of complementry colours for this question )