You were driving your car to UTD at a speed of 35 miles per hour. You stopped at the FloydCampbell intersection with the signal light showing red (wavelength = 6.45 × 10–5 cm). After 30 sec, the signal becomes green whose frequency is 5.80 × 1014 s –1 . Which light has higher energy?

Respuesta :

Answer:

green light have high energy

Explanation:

We have given the wavelength of the red light [tex]\lambda =6.45\times 10^{-5}cm=6.45\times 10^{-7}m[/tex]

Speed of the light [tex]c=3\times 106{8}m/sec[/tex]

The energy of the signal is given by [tex]E=h\nu =h\frac{c}{\lambda }=\frac{6.67\times 10^{-34}\times 3\times 10^{8}}{6.45\times 10^{-7}}=3.1023\times 10^{-15}j[/tex]

The frequency of the green light is given by:

[tex]f=5.80\times 10^{14}s^{-1}[/tex]

So energy [tex]E=h\nu =6.67\times 10^{-34}\times 5.80\times 10^{14}=3.8686\times 10^{-19}j[/tex]

So green light have high energy

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