Dual nature of light and x ray (day 2)

Which phenomenon can be explained by the wave nature of light but not by its particle nature?

• • Photoelectric Effect

• • Compton Scattering

• • Interference

• • Photoelectric Emission

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NGSS.HS-PS4-3

Which scientist proposed the concept of matter waves, suggesting that particles such as electrons exhibit both particle and wave characteristics?

• Max Planck

• • Albert Einstein

• • Louis de Broglie

• • Werner Heisenberg

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NGSS.HS-PS4-3

Which experiment provided evidence for the wave-like nature of electrons?

• Photoelectric Effect

• • Davisson-Germer Experiment

• • Millikan Oil Drop Experiment

• • Compton Scattering

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NGSS.HS-PS4-3

The wavelength of electrons used in electron microscopes is much shorter than that of visible light. What does this result in?

• • Lower resolution

• • Higher resolution

• • Reduced magnification

• • Inverted images

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NGSS.HS-PS4-1

What is the purpose of the objective lens in a Transmission Electron Microscope

• • To focus the electron beam

• • To magnify the image

• • To control specimen illumination

• • To scan the specimen surface

What is the purpose of the vacuum environment in an electron microscope?

• • To increase electron wavelength

• • To reduce air resistance

• • to increase electron scattering.

• to reduce electron scattering.

What is the primary factor influencing the energy of X-rays produced in a continuous X-ray spectrum?

• • Atomic number of the target material

• • Current in the X-ray tube

• • Voltage applied to the X-ray tube

• • Temperature of the X-ray tube

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NGSS.HS-PS4-3

In characteristic X-ray spectra, the energy of emitted X-rays is determined by:

• • Voltage applied to the X-ray tube

• • Atomic number of the target material

• • Current in the X-ray tube

• • Temperature of the X-ray tube

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NGSS.HS-PS4-3

What happens to the intensity of characteristic X-rays as the atomic number of the target material increases?

• • Increases

• • Decreases

• • Remains constant

• • increases and then decreases

In the production of characteristic X-rays, what is the role of the incident X-ray photon?

• It knocks out an inner-shell electron.

• • It scatters off an outer-shell electron.

• • It interacts with a proton in the nucleus.

• • It annihilates an electron-positron pair.

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NGSS.HS-PS4-3