# Blackbody radiation lab | Physics homework help

Name :                                                    Blackbody Radiation Lab 11

and click on Run Now.

1) In this lab, you will use the Blackbody Spectrum Simulation to investigate how the spectrum of electromagnetic radiation emitted by objects is affected by the object’s temperature. In this simulation, you can input the temperature and observe the spectrum of the radiation emitted.

a) The temperature of stars in the universe varies with the type of star and the age of the star among other things. By looking at the shape of the spectrum of light emitted by a star, we can tell something about its average surface temperature.

i) If we observe a star’s spectrum and find that the peak power occurs at the border between red and infrared light, what is the approximate surface temperature of the star? (in degrees C)

ii) If we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light, what is the surface temperature of the star? (in degrees C)

b) Light bulbs operate at 2500 degrees C.

i)                    What is the wavelength at which the most power is emitted for a light bulb operating at 2500 C?

ii) Explain why regular incandescent bulbs waste a lot of energy. Be sure to include your reasoning.

2) In this problem we will explore the greenhouse effect by using the Greenhouse Effect Simulation available from http://phet.colorado.edu/simulations/sims.php?sim=The_Greenhouse_Effect

a) Explore the simulation.

True or False

The only effect of increasing the number of clouds is to reduce the amount of sunlight absorbed by the surface of the earth.

True or False

Increasing the concentration of greenhouse gases, increases the amount of radiation that Earth emits to space.

True or False

When sunlight encounters a cloud, the cloud reflects about 10% of the sunlight back to space.

True or False

When there is a very large concentration of greenhouse gases, most of the IR radiation reaching space has interacted with greenhouse gas molecules on its way from the surface to space.

True or False

The total amount of radiation absorbed by the Earth’s surface is not affected by the concentration of greenhouse gases in the atmosphere.

True or False

At higher temperatures, the Earth’s surface emits more IR radiation.

True or False

During the ice age, the amount of sunlight absorbed by the Earth’s surface decreased.

True or False

All greenhouse gases are from anthropogenic sources (that is due to man’s activities).

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.