Light with wavelength 503 nm passes through crystalline sodium chloride. (The index of refraction of sodium chloride is 1.544.) (a) Find the speed of light in this medium. v = m/s
(b) Find the wavelength of the light. λn = nm
(c) Find the frequency of the light. f = Hz

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90