Tirohia te wāhanga i raro nei, kātahi ka whakautu i te pātai i muri mai i te reo kotahi me te wāhanga:  Passage: Ko te photodiode he hononga p<unk>n, he hanganga PIN ranei. Ina patua e te photon o te pūngao e tika ana te diode, ka waihanga i tētahi takirua irahiko. E mōhiotia ana hoki tēnei tikanga ko te pānga whakaahua ā-roto. Ki te puta te absorption i roto i te rohe matotoru o te hononga, kotahi te roa horapa atu i te reira, e horoia ana enei kaikawe i te hononga i te mara hiko hanga-i roto i o te rohe matotoru. Na ka neke nga poka ki te anode, me nga irahiko ki te cathode, a ka whakaputahia he photocurrent. Ko te toharite o te wa i roto i te photodiode ko te huinga o te wa pouri (te wa e hangaia ana i te kore o te marama) me te photocurrent, na me whakaitihia te wa pouri ki te whakanui ake i te maaramatanga o te taputapu. Ki te raupapa tuatahi, mo te tohatoha spectral kua hoatu, he rite tonu te photocurrent ki te irradiance.  Pātai: He aha te mea e tika ana kia pā ki te diode hei hanga i te takirua irahiko-roto?
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