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مشاهدة النسخة كاملة : laser safety



ola27
11-29-2009, 04:49 AM
I have 2 Qs I could not solve them



If you had a laser that emits blue light at 480 nm wavelength and 100mW power, how wide must the beam be if it is to be safe when shone at a human eye for up to one minute?




For the grating you used (1.66µm groove spacing), is there a wavelength for which you cannot get any diffracted orders?



what do u think answers would be

Thanks

Einstein Uae
12-01-2009, 10:53 PM
shall you show us what you have done so i can help you

at least tell me how u think about the 2 questions and what are the equations needed for those two questions

waiting for your response