The book shows a photograph of a human face, taken at shorter and shorter camera exposure times. What is observed at the shortest exposure times, and what does this observation demonstrate about the nature of light?
A) We observe a very dim but complete image of the face, showing that light is made of waves that have smaller amplitude as the light is reduced.
B) We observe light and dark lines due to interference, showing that light is a wave.
C) Individual white dots are distributed all over the photographic plate, showing that light is made of waves.
D) We observe individual white dots at the center of the photograph, showing that the camera tends to focus individual photons at this point.
E) Individual white dots were distributed randomly over the photographic plate, showing that light interacts with the screen in tiny bundles.
Question 2
The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44.0 g/mole, is 396 m/s. What is the rms speed of water vapor molecules, with a molecular weight of 18.0 g/mol, at the same temperature as the carbon dioxide?
A) 253 m/s
B) 387 m/s
C) 421 m/s
D) 506 m/s
E) 619 m/s
Diffusion spectrum MR image of human brain
Structure of the globular domain of human PrP in monomeric
Human Memorabilia in Space
Overview of fat digestion, absorption, storage, and mobilization in the human
Share of Human Capital in Wages in Advanced Countries
Chart showing average yearly dose of radiation from natural and human-made sources