Question

Particle movement due to photophoresis depends on _________

(a) Shape and size of the particle

(b) Optical properties of the particle

(c) Wavelength and intensity of incident light

(d) All of the mentioned

The question was posed to me in an interview for internship.

I'm obligated to ask this question of Aerosols in division Particulates, Acid Rain & Aerosols of Environmental Engineering

Answer 1

Correct answer is (d) All of the mentioned

For explanation: Particle movement due to photophoresis depends on the shape, size and optical properties of the particle, as well as wavelength and intensity of incident light.