Please help me :( 1.) A laser emits light of frequency = 4.74 x 1014 sec-1. What is the wavelength of the light in nm?

2.) A certain electromagnetic wave has a wavelength of 625 nm.

a.) What is the frequency of the wave?

b.) What region of the electromagnetic spectrum is it found?

c.) What is the energy of the wave?

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.