{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 2

# Chapter 2 - Chapter 2 Law of conservation of mass= mass is...

This preview shows pages 1–2. Sign up to view the full content.

Chapter 2 Law of conservation of mass= mass is nether created or destroyed Law of definite proportions=a given compound always contains exactly the same proportion of elements by mass Law of multiple proportions= when two elements form a series of compounds, the ratios of the masses of the second element that combine with 1 gram of the first element can always be reduced to small whole numbers Chapter 12 Wavelength= λ (lambda) this is the distance between two consecutive peaks or toughs in a wave Frequency=ν (nu) is the number of waves per second that passes a given point in space This all travels at the speed of light-Electromagnetic radiation Short wavelength has a high frequency and long wavelength has a low frequency Thus λν=c , where c= the speed of light which is 2.99792458x10 8 meters/second or 3x10 8 Wavelength is in meters and frequency is in cycles per second. Cycles per second is also called Hertz which is described as 1/s or s -1 Max Planck studied intensity v wavelength Blackbody radiation-idealized object that absorbs all the radiation incident on it, originates from the thermal energy of the body only and not does include radiation reflected from an object Ultraviolet catastrophe= a prediction that an ideal black body at thermal equilibrium will emit radiation with infinite power. Plack’s constant 6.626x10 -34 Js which is the change in energy for a system = ∆E= nh ν and n= a number 1, 2,3, h =6.626x10 -34 Js and v = the frequency of electromagnetic radiation is absorbed or emitted or λν=c Physicists always assumed that energy was continuous but this made it quantized (can put a number on it) Photons=stream of particles Einstein/ photoelectric effect-electrons are emitted from the surface area when the light strikes it and the number of electrons increases with the intensity of light. The threshold frequency is the kinetic energy of electrons that increase linearly with the frequency of light. Threshold frequency is the minimum energy to remove an electron which = E 0 = h ν 0 which means zero and can’t have any less than zero.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern