The difference between lightwaves approaching and lightwaves receding is

A. when approaching, lightwaves have higher frequency; when receding, their frequency is lower.
B. the frequency of approaching lightwaves remain constant, while receding lightwaves are invisible.
C. when approaching, lightwaves have lower frequency; when receding, their frequency is higher.
D. There is no difference.


Answer: A

Environmental & Atmospheric Sciences

You might also like to view...

Which feature is not usually caused by convergent boundaries?

A) volcanoes B) deep-sea trenches C) rift valleys D) mountains

Environmental & Atmospheric Sciences

For which of the following reactions is it important that the species collide with the correct orientation?

A) 2 NO(g) + O2(g) ? 2 NO2(g) B) HCl(g) + H2O(l) ? H3O+(aq) + Cl-(aq) C) both of them D) neither of them

Environmental & Atmospheric Sciences

A land breeze usually originates during the ________

A) evening and flows toward the water B) day and flows toward the land C) evening and flows toward the land D) day and flows toward the water

Environmental & Atmospheric Sciences

A broad-spectrum biocide is designed to kill

A. A wide range of plants B. Specifically multicellular organisms C. Microbes that are neither plant nor animal D. Specifically unicellular organisms E. A wide range of living organisms

Environmental & Atmospheric Sciences