Sakalam, a light-emitting device, requires 10,068.68 ZW (Zeptowatt) of power every 500 milliseconds (ms). The energy of light being produced by Sakalam is equal to the amount of energy required to run the device at the given time. Refer to the given tables for the useful relations, necessary constants and definitions of variables, and colors corresponding to wavelengths of visible light. a. How much energy (in Joules) is equivalent to the power required by Sakalam at the given time? b. What is the wavelength of light (in nanometers, nm) being produced by Sakalam? c. What is the color of the light being produced by Sakalam?

College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
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Chapter22: Reflection And Refraction Of Light
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Sakalam, a light-emitting device, requires 10,068.68 ZW (Zeptowatt) of power every 500 milliseconds (ms). The energy of light being produced by Sakalam is equal to the amount of energy required to run the device at the given time. Refer to the given tables for the useful relations, necessary constants and definitions of variables, and colors corresponding to wavelengths of visible light.

 

a. How much energy (in Joules) is equivalent to the power required by Sakalam at the given time?

b. What is the wavelength of light (in nanometers, nm) being produced by Sakalam?

c. What is the color of the light being produced by Sakalam?

 

 

Necessary Constants and
Definitions of Variables
Useful Relations
1 W (watt) = 1 J/s
1 W = 1021 ZW
1 Hz = 1s' (per second)
1 ev = 1.6022 x 10-18 J
Energy of photon of light (in eV) = hf
c = Af
c (speed of light) = 3.00 × 10° m/s
h (Planck's constant) = 4.136 x 1015
eV/Hz
f= frequency of light
A = wavelength of light
Wavelength (nm) Color
380 - 450
450 - 500
500 - 565
565 - 590
590 - 625
625 - 700
violet
blue
green
yellow
orange
red
Transcribed Image Text:Necessary Constants and Definitions of Variables Useful Relations 1 W (watt) = 1 J/s 1 W = 1021 ZW 1 Hz = 1s' (per second) 1 ev = 1.6022 x 10-18 J Energy of photon of light (in eV) = hf c = Af c (speed of light) = 3.00 × 10° m/s h (Planck's constant) = 4.136 x 1015 eV/Hz f= frequency of light A = wavelength of light Wavelength (nm) Color 380 - 450 450 - 500 500 - 565 565 - 590 590 - 625 625 - 700 violet blue green yellow orange red
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