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

Methanogenic bacteria is used to produce

Which method is used to produce nitric acid ?

Monochromatic light of frequency 6 times 10^14 Hz is produced by laser. Each photon has an energy=…….

helium-Neon laser emit monochromatic light of 667 nm abd produce power of 9 kW.number of photon reaching to target every second will be………

A light source emit monochromatic light of 5000 Å wavelength and produce 5 W power .When it is displaced by 0.5 m from photo sensitive surface photoelectron are emitted,when distance increased by 0.5, no.of photoelectron liberated will become ……

When monochromatic red light is used instead of blue light in a convex lens, its focal length will ......