Every substance is associated to emission of electromagnetic radiation whose peaks are essentially influenced by temperature. Hot bodies (i.e., at T >700 °C) emit electromagnetic radiation in the field of visible light (incandescent light). The radiation emitted by cold bodies (i.e., at normal ambient conditions) in the visible light range is…

The likelihood of teaching a student with autism spectrum disorder (ASD) has steadily increased over the past two decades. However, the practical information about working with students with ASD has not increased at a similar rate. Teachers may therefore be unaware of simple modifications they can make to their classrooms to meet the needs of…

Competent authorities seem to agree as to the causes of eye strain in school children other than congenital defects. Standard works on diseases of the eye are practically unanimous in declaring that myopia results from the protracted and unhygienic use of the eyes in near work. Most of the factors tending to cause eye strain exist in the schools.…