Explanation:
[tex]wavelength= 435 \times {10}^{ - 9} m[/tex]
[tex]a. \: frequency= \frac{speed \: of \: violet \: light}{wavelength} [/tex]
[tex]f = \frac{3 \times {10}^{8} }{435 \times {10}^{ - 9} } [/tex]
[tex]f = 0.00689\times {10}^{ 17} hz[/tex]
[tex]f = 6 .89 \times {10}^{14} hz[/tex]
[tex]b. \: Energy = h \times f[/tex]
[tex] = 6.626 \times {10}^{ - 34} \times 6.89 \times {10}^{14} [/tex]
[tex] = 45.65 \times {10}^{ - 20} Joules[/tex]
