Question

Ozone absorbs photons having wavelengths of 2.2 x 10^-7 m to 2.9 x 10^-7 m thus protecting organisms on earth's surface from the high E uv radiation. What are the frequency and energy of the LEAST energetic of these photons?

Answer 1

Shorter the wavelength higher is the energy

So, 2.2×10^-7m is the high energy wavelength

Frequency, = c/

c = speed of light , 2.99×10^8m/s

= wavelength, 2.2×10^-7m

Therefore,

   = 2.99×10^8(m/s)/2.2×10^-7m

= 1.36×10^15s^-1

Energy, E = h

= 6.626×10^-34J.s × 1.36×10^15s^-1

= 9.01× 10^-19J