Explain quantum efficiency

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Reference no: EM133227917

Assignment:

Read "NASA's James Webb Space Telescope could study Planet 9"

Q. 1: If photons of blue light have more energy than photons of red light, how can a beam of red light carry as much energy as a beam of blue light?

Q. 2: Name and explain at least two (2) advantages that reflecting telescopes have over refractors.

Q. 3: What is refraction and what causes it? Explain.

Q. 4: Consider two optically perfect telescopes having different diameters but the same focal length. Is the image of a star larger or smaller in the focal plane of the larger telescope? Explain your answer!

Q. 5: Explain quantum efficiency and how it contributes to the detection of faint astronomical objects.

Here we will explore the following questions: How many properties does a wave have? Are any of these related to each other?

(1) Visit the Digital Resources Page and on the Student Site open the Light as a Wave, Light as a Photon" Astro Tour.

(2) Watch the first section, and click through using the "Play" button until you reach section 2 of 3. Answer the following questions:

1: Increase the wavelength using the arrow key. What happens to the rate of the frequency counter? Explain

2: Reset the simulation and then decrease the wavelength. What happens to the rate of the frequency counter? Explain

3: How are frequency and wavelength related to each other?

4: Reset the simulation and increase the frequency. Did the wavelength change in the way you expected?

5: Reset the simulation and increase the amplitude. What happens to the wavelength and the frequency counter? Explain.

Reference no: EM133227917

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