Prior to Einstein's paper, electromagnetic radiation such as visible light was considered to behave as a wave: hence the use of the terms "frequency" and "wavelength" to characterise different types of radiation. The energy transferred by a wave in a given time is called its intensity. The light from a theatre spotlight is more intense than the light from a domestic lightbulb; that is to say that the spotlight gives out more energy per unit time and per unit space(and hence consumes more electricity) than the ordinary bulb, even though the colour of the light might be very similar. Other waves, such as sound or the waves crashing against a seafront, also have their own intensity. However, the energy account of the photoelectric effect didn't seem to agree with the wave description of light. COUNT 8
QSN1 Before Einstein, electromagnetic radiation was considered to behave as what? ANS1 a wave QSN2 What terms describe different types of radiation? ANS2 "frequency" and "wavelength" QSN3 What other types of wave besides light has its own intensity? ANS3 sound QSN4 What is the energy transferred by a wave in a given time called? ANS4 intensity QSN5 Prior to Einstein's work, light behavior was modeled as what? ANS5 a wave QSN6 What is the name for the amount of energy transfered by a wave in a given time? ANS6 intensity QSN7 What portion of the photoelectric effect was in disagreement with the believed description of light behavior? ANS7 the energy account QSN8 What does it mean for a light source to be more intense than another? ANS8 gives out more energy per unit time and per unit space