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Rank the following lasers according to the energy per photon they provide, from least to greatest: 1) A blue laser of 2 cm diameter beam. 2) A green laser of 4 cm diameter beam. 3) A red laser of 10 m diameter beam. 4) An ultra-violet of 1 mm diameter beam.

Rank the following lasers according to the energy per photon they provide, from least to greatest: 1) A blue laser of 2 cm diameter beam. 2) A green laser of 4 cm diameter beam. 3) A red laser of 10 m diameter beam. 4) An ultra-violet of 1 mm diameter beam.

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**Understanding Laser Light Source Energy Levels** **Lasers as Monochromatic Sources of Light:** Lasers are monochromatic sources of light. This means that all the photons emitted by the laser are of the same frequency. --- ### Part A **Question:** Rank the following lasers according to the energy per photon they provide, from least to greatest: 1. A blue laser of 2 cm diameter beam. 2. A green laser of 4 cm diameter beam. 3. A red laser of 10 m diameter beam. 4. An ultra-violet laser of 1 mm diameter beam. --- **Options:** - **Option 1:** 3, 2, 1, 4 - **Option 2:** 3, 4, 1, 2 - **Option 3:** 1, 2, 3, 4 - **Option 4:** They all have the same energy per photon --- At the bottom of the question is a **Submit** button, along with a **Request Answer** link. In answering this question, consider the relationship between the frequency of light and the energy per photon: higher frequency light (blue and ultra-violet) has more energy per photon than lower frequency light (red and green). --- **Explanation:** - The energy per photon (\(E\)) is given by the equation \(E = h \cdot f\), where \(h\) is Planck's constant and \(f\) is the frequency of the light. - Blue light has a higher frequency than green light. - Green light has a higher frequency than red light. - Ultra-violet light has a higher frequency than all of these, therefore the energy per photon is the greatest. This explanation will help in determining the correct ranking of the laser beams from least to greatest energy per photon. --- **Answer:** Use the provided options to mark your answer based on the frequency and thus the energy per photon of each laser type.
Transcribed Image Text:**Understanding Laser Light Source Energy Levels** **Lasers as Monochromatic Sources of Light:** Lasers are monochromatic sources of light. This means that all the photons emitted by the laser are of the same frequency. --- ### Part A **Question:** Rank the following lasers according to the energy per photon they provide, from least to greatest: 1. A blue laser of 2 cm diameter beam. 2. A green laser of 4 cm diameter beam. 3. A red laser of 10 m diameter beam. 4. An ultra-violet laser of 1 mm diameter beam. --- **Options:** - **Option 1:** 3, 2, 1, 4 - **Option 2:** 3, 4, 1, 2 - **Option 3:** 1, 2, 3, 4 - **Option 4:** They all have the same energy per photon --- At the bottom of the question is a **Submit** button, along with a **Request Answer** link. In answering this question, consider the relationship between the frequency of light and the energy per photon: higher frequency light (blue and ultra-violet) has more energy per photon than lower frequency light (red and green). --- **Explanation:** - The energy per photon (\(E\)) is given by the equation \(E = h \cdot f\), where \(h\) is Planck's constant and \(f\) is the frequency of the light. - Blue light has a higher frequency than green light. - Green light has a higher frequency than red light. - Ultra-violet light has a higher frequency than all of these, therefore the energy per photon is the greatest. This explanation will help in determining the correct ranking of the laser beams from least to greatest energy per photon. --- **Answer:** Use the provided options to mark your answer based on the frequency and thus the energy per photon of each laser type.
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