The particle nature of light

Planck's constant value

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matter can gain or lose energy only in small, specific amounts called

• quanta

• atoms

• particles

The (a)   is when electrons are emitted from a metal's surface when light of a certain frequency shines on it.

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Electrons loses fixed amount of energy on the form of _________ wave packet.

• Quantum

• Discrete

• Atoms

• Particles

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Calculate the Energy of a Photon Every object gets its color by reflecting a certain portion of incident light. The color is determined by the wavelength of the reflected photons, thus by their energy. What is the energy of a photon from the violet portion of the Sun’s light if it has a frequency of 7.230 × 10¹⁴ s ^-1?

(a)  

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Calculate the energy possessed by a single photon of each of the following types of electromagnetic radiation.

6.32 × 10²⁰ s ^–1

(a)  

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Calculate the energy possessed by a single photon of each of the following types of electromagnetic radiation.

9.50 × 10 ¹³ Hz

(a)  

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Calculate the energy possessed by a single photon of each of the following types of electromagnetic radiation

1.05 × 10¹⁶ s ^–1

(a)  

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The energy of photoelectrons emitted from a metal surface can be increased by

• using light of higher frequency.

• using light of longer wavelength.

• using light of higher intensity.

• using monochromatic, polarized light.

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This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model

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