" Algae found in areas with abundant light as well as areas of great depths with no light is "

The biprism experiment is performed by using first the blue light of wavelength 4800 Å and then with red light. It is found that the fourth bright band of blue light coincides with the third bright band of red light. What is the wavelength of red light?

Light from a point source falls on a small area placed perpendicular to the incident light. If the area is rotated about the incident light by an angle of 60^(@) , by what fraction will the illuminance change

A laser uniformly illuminates an area with green light that has an average intensity of 550 W//m^(2) . What is the rms value of the electric field of this light ?

Tissue found in area of regular wear and tear is

Why do algae live in well lighted areas ?

A student collected an alga and found that its cells contain both chl a and chl d as well as phycoerythrin but no chl b and flagella. The alga bolongs to