Different questions but need help

Question

2. Calculate frequency for a wavelength that equals 7.00x10

-9

m.

3. Calculate the energy of one quanta of light that has a frequency of 3.0 X 10

12

Hz.

4. What is the energy of a quantum of light with a frequency of 7.39 x 10

14

Hz?

5. A certain blue light has a frequency of 6.91 x 10

14

Hz. What is the wavelength of the light?

Answer 1

2. c = wavelength x frequency

frequency = c / wavelength = 3 x 10⁸ / 7.00 x 10^-9 = 4.3 x 10¹⁶ Hz

3. E = h x frequency

Energy = h = 6.626 x 10^-34 x 3.0 x 10¹² = 2.00 x 10^-19 J

4. E = h x frequency

Energy = h = 6.626 x 10^-34 x 7.39 x 10¹⁴ = 4.90 x 10^-19 J

5. 2. c = wavelength x frequency

wavelength = c / frequency = 3 x 10⁸ / 6.91 x 10¹⁴ = 4.3 x 10^-7 Hz