Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
astro111n_ch5
| Question | Answer |
|---|---|
| Why is a sunflower yellow? | It reflects yellow light. |
| Blue light has higher frequency than red light. Thus, blue light has: | higher energy and shorter wavelength than red light. |
| If we say that a material is opaque to ultraviolet light, we mean that it _________. | absorbs ultraviolet light |
| Recall that one of the laws of thermal radiation states that a higher-temperature object emits photons with higher average energy (Wien’s law). This law is illustrated by the fact that for a higher temperature object, the graph peaks at __________. | a shorter wavelength, Wien’s law states that the thermal radiation from a hotter object peaks at a shorter wavelength. |
| The neon “OPEN” sign appears reddish-orange because __________. | neon atoms emit many more yellow and red photons than blue and violet photons |
| Suppose instead that we are looking at the gas cloud but the light source is off to the side instead of directly behind it. In that case, the spectrum would __________. | be an emission spectrum |
| What type of visible light spectrum does the Sun produce? | an absorption line spectrum |
| Which of the following forms of light can be observed with telescopes at sea level? | radio waves, visible light |
| If our eyes were sensitive only to X rays, the world would appear __________. | dark because X-ray light does not reach Earth’s surface |
| If you had only one telescope and wanted to take both visible-light and ultraviolet pictures of stars, where should you locate your telescope? | in space |
| The Hubble Space Telescope obtains higher-resolution images than most ground-based telescopes because it is: | above Earth's atmosphere. |
Created by:
zemca
Popular Science sets