Questions from Modern Physics

Q: The shortest visible wavelength is about 400 nm. What is the

The shortest visible wavelength is about 400 nm. What is the temperature of an ideal radiator whose spectral emittance peaks at this wavelength?

Q: The wavelength 10.0 mm is in the infrared region of

The wavelength 10.0 mm is in the infrared region of the electromagnetic spectrum, whereas 600 nm is in the visible region and 100 nm is in the ultraviolet. What is the temperature of an ideal blackbod...

Q: a. The uncertainty in the y-component of a proton’s

a. The uncertainty in the y-component of a proton’s position is 2.0 * 10-12 m. What is the minimum uncertainty in a simultaneous measurement of the y-component of the proton’s velocity? b. The uncert...

Q: An electron is moving with a speed of 8.00 *

An electron is moving with a speed of 8.00 * 106 m/s. What is the speed of a proton that has the same de Broglie wavelength as this electron?

Q: a. A nonrelativistic free particle with mass m has kinetic energy

a. A nonrelativistic free particle with mass m has kinetic energy K. Derive an expression for the de Broglie wavelength of the particle in terms of m and K. b. What is the de Broglie wavelength of an...

Q: What is the de Broglie wavelength for an electron with speed

What is the de Broglie wavelength for an electron with speed a. v = 0.480c and b. v = 0.960c? (Hint: Use the correct relativistic expression for linear momentum if necessary.)

Q: Calculate the de Broglie wavelength of a 5.00-g

Calculate the de Broglie wavelength of a 5.00-g bullet that is moving at 340 m/s. Will the bullet exhibit wavelike properties?

Q: A large number of hydrogen atoms are in thermal equilibrium. Let

A large number of hydrogen atoms are in thermal equilibrium. Let n2/n1 be the ratio of the number of atoms in an n = 2 excited state to the number of atoms in an n = 1 ground state. At what temperatur...

Q: Repeat Exercise 34.38 for the case in which the lens

Repeat Exercise 34.38 for the case in which the lens is diverging, with a focal length of -48.0 cm. From Exercise 34.38: A converging lens with a focal length of 12.0 cm forms a virtual image 8.00 mm...

Q: a. What is the smallest amount of energy in electron volts

a. What is the smallest amount of energy in electron volts that must be given to a hydrogen atom initially in its ground level so that it can emit the Ha line in the Balmer series? b. How many differ...