Which pair shows the law of reflection?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Which sound characteristic is not affected by the relative motion of an object

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=