Monochromatic light shold be used to produce pure specturm. Comment on this statement.

Ecosystem management - comment on the statement.

Peanut is a geocarpic fruit - Comment on the statement.

“Role of hormones in spermatogenesis” - comment on the statement.

During cleavage of the mammalian zygote, the resultant blastomeres become smaller and smaller. Comment on this statement.

Monochromatic light of frequency 6.0xx10^(14)Hz is produced by a laser. The power emitted is 2.0xx10^(-3) W. (a). What is the energy of a photon in the light beam? (b) How many photons per second, on an average are emitted by the source?

"It is dangerous to take drugs without prescription of a doctor at early months of pregnancy". Comment on this statement.

A non-monochromatic light is used in an experiment on photoelectric effect. The stopping potential

Photosynthesis protects us from harmful ultraviolet radiaion of sun comment on the statement.

In Young's double slit experiment with slit separation d, a monochromatic light of wavelength lamda is used. The angular separation of the fringes is

Monochromatic light of frequency 6 xx 10^(14) Hz is produced by a laser. The power emitted is 2.0 xx 10^(-3) W . How many photons per second on an average are emitted by the source ?