(a) The wavelength of a Balmer series line (from n = 3) for by found to be 656.5 nm. What percentage difference is found between the
and the wavelength predicted by ; = R
( 7 )
[R = 1.097 x 107m]
[GMarks)
(b) If a hydrogen atom has its electron in the n = 4 state, how much energy
in eV is needed to ionize it?
= 3 x 108m/s, h = 6.6 x 10-341/s, 1ev = 1.602 x 10-9/] [6 Marks]

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.