Context: 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.

Question: Before Einstein, electromagnetic radiation was considered to behave as what?
Answer: a wave

Question: What terms describe different types of radiation?
Answer: "frequency" and "wavelength"

Question: What is the energy transferred by a wave in a given time called?
Answer: intensity

Question: What other types of wave besides light has its own intensity?
Answer: sound

Question: Prior to Einstein's work, light behavior was modeled as what?
Answer: a wave

Question: What is the name for the amount of energy transfered by a wave in a given time?
Answer: intensity

Question: What portion of the photoelectric effect was in disagreement with the believed description of light behavior?
Answer: the energy account

Question: What does it mean for a light source to be more intense than another?
Answer: gives out more energy per unit time and per unit space

Question: What terms describe the same types of radiation?
Answer: Unanswerable

Question: What is the energy lost by a wave in a long time called?
Answer: Unanswerable

Question: What other types of wave besides light doesn't have its own intensity?
Answer: Unanswerable

Question: What is the name for the amount of energy disappearing by a wave in a given time?
Answer: Unanswerable

Question: What does it mean for a light source to be equally intense?
Answer: Unanswerable