The wavelength of light (in nm) required for tantalum ( =6.81× 10-19 J) to emit an electron: nm Could tantalum be used to generate electricity from the sun? Choose one: O Yes, the threshold wavelength is larger than the wavelength of the sun so electricity is generated. O No, the threshold wavelength is larger than the wavelength of the sun so electricity will not be generated. O No, the threshold wavelength is lower than the wavelength of the sun so electricity will not be generated. O Yes, the threshold wavelength is lower than the wavelength of the sun so electricity will be generated.

A line in the spectrum of atomic mercury has a frequency of 1.16 x 105 mercury emits a photon of light at this frequency, what is the wavelength (nm) of this light? Hz. When

How much energy (in Joules) is associated with a de Brogile wavelength of 6.80 x 10-7 meters?

The photoelectric effect can be used in engineering designs for practical applications. For example, infrared goggles used in night-vision applications have materials that give an electrical signal with exposure to the relatively long wavelength of IR light. If the energy needed for signal generation is 7.6 x 10-40 J, what is the minimum wavelength? What is the frequency of light that can be detected? c = 2.998 × 10° m/s h = 6.626 x 10-34 J s m S -1

What is the wavelength of the matter wave associated with a proton moving at 391 m/s? wavelength of proton matter wave: What is the wavelength of the matter wave associated with a 189 kg astronaut (including her spacesuit) moving at the same speed? wavelength of astronaut matter wave: What is the wavelength of the matter wave associated with Earth moving along its orbit around the Sun? wavelength of Earth matter wave: m m m

The minimum frequency of light needed to eject electrons from a metal is called the threshold frequency, ?0. Find the minimum energy needed to eject electrons from a metal with a threshold frequency of 3.20×1014 s−1. With what maximum kinetic energy will electrons be ejected when this metal is exposed to light with a wavelength of 285 nm?

The electron in an (unbound) hydrogen atom (H(g)) is excited from the ground state to the n=3 state.Which of the following statements are true and which are false. 1. it takes less energy to ionize the electron from n=3 than it does from the ground state.2. The wavelength of the light emitted when the electron returns to the ground state from n=3 is the same as the wavelength of light absorbed to go from n=1 to n=3.3. the electron is farther from the nucleus on average in the n=3 state than in the ground state.4. The first excited state corresponds to n=3.5. The wavelength of light emitted when the electron drops from n=3 to n=2 is shorter than the wavelength of light emitted if the electron falls from n=3 to n=1.

If an electron were to move from n=4 to n=2 and produce light with a wavelength of 580 nm, what is the wavelength equivalent in meters?