A light with a second-order dark band forms a diffraction angle of 20.0°. The diffraction grating has 200.0 lines per nm The wavelength of the light, to the nearest whole number, is nm. ,

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

that the claims meet official rules.

don't misinterpret the claims

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

a. (6mp + 8mn) - mc - 14