WorksheetsUnit 1 Exam B Review
Total questions: 13
Worksheet time: 13mins
When a green light and a red light are mixed by shining them together on a white screen, what will appear to be the color of the light on the screen?
The mixed color is an intense red.
The mixed color is blue.
The mixed color is an intense green.
The mixed color is yellow.
When a green light and a red light are shined together, why will the new color of light be brighter than the green or red light alone? Select all that apply.
Some colors are brighter than other colors before being mixed.
The color is brighter than the green or red light alone because it is made of both the green light AND the red light.
In order for a light to be brighter, it has to come from a bulb with a higher wattage.
The more light that reaches our eyes, the brighter the light appears.
Green light is shining on a green plant in a red pot. There are no other lights in the room.
What color will the green plant appear to be? Choose the best explanation.
The plant will appear green because it absorbs all of the green colors and the rest of the colors get transmitted through the leaves.
The plant will appear green since it does not absorb that color but rather scatters it, so our eyes will detect scattered green light from the plant.
Green light is shining on a green plant in a red pot. There is no other light in the room. What color will the red pot appear to be? Choose the best explanation.
The red pot will appear black because it will absorb all the green light reaching it and scatter none, so no light will reach our eyes from the pot.
The red pot will appear yellow because red and green light make yellow light and the leaves will reflect the yellow light to our eyes.
Which plant above will grow better , a green plant illuminated by green light or a green plant illuminated by red light? Choose the best explanation.
The green plant illuminated by red light will grow better because the plant will be able to absorb this light. On the other hand, the green plant illuminated by green light will grow very poorly if at all because it will not be able to absorb any of the light reaching it.
The plant will grow better in green light because its leaves are green The leaves absorb the green light and use it to make its own food.
The plant will not grow well in either light because a plant needs full light in order go through photosynthesis.
What should be added to this drawing to show what happens to the light after it hits the filter?
You should show the blue light is absorbed by the filter and the green and red light get transmitted.
You should show the blue light reflecting back toward the flashlight. All of the other light colors get transmitted through the blue filter.
You should only show the blue light being reflected and the rest of the colors are absorbed.
You should show blue light being transmitted through the filter and the other colors of light being absorbed. Some of the blue light should be reflected back toward the flashlight.
How can white light be separated into the colored lights of which it is composed? Select all that apply.
White light can get separated when using C-Spectra paper but it also gets separated when it interacts with a prism or raindrops in the atmosphere where the light gets bent (refracted).
When white light is transmitted it separates out into its various colors.
When mixing light, some of the colors get canceled out so that new colors shine very brightly.
Filters can separate the colors in white light by absorbing some colors and transmitting the rest.
Is there light you cannot see? Select all that apply.
Infrared is a type of light that we cannot see. We observed that just like visible light, infrared light travels in straight lines and can be reflected, transmitted, and absorbed.
Ultraviolet is another light we cannot see. In class we used a UV detector to measure the amount of UV light coming in through a window.
Young generations are able to see radio waves and X-rays but the older generations are not able to detect that type of light.
Yes, we can see all of the colors plus infrared and ultraviolet light. The rest of the types of light we are not able to see.
Both infrared light (IR) and ultraviolet light (UV) have wavelengths outside the range of wavelengths visible to humans. Infrared light has a wavelength that is too long to be seen, and UV light has a wavelength that is too short. UV light can be damaging to the skin, so the sunscreen makers want sunscreen to absorb all of the UV so that none of it reaches the skin. Why is it not a good idea to have sunscreen absorb visible light? What would the sunscreen look like if it absorbed all of the visible light that hit it? Select the best answer.
If sunscreen absorbed visible light, it would look bright white because it would scatter no light back to our eyes.
If sunscreen absorbed visible light, people would not be able to obtain a deeper tan.
f sunscreen absorbed all of the visible light, we would not be able to see the objects near us.
If sunscreen absorbed visible light, it would look black because it would scatter no light back to our eyes.
How does sunscreen work similar to color filters?
Just as a filter will absorb some wavelengths of color but not others, sunscreen will absorb all of the visible light but not UV light.
Sunscreens scatter the sunlight back out into the air and won’t let it touch your skin.
Just as a filter will absorb some wavelengths of color but not others, sunscreen will absorb UV light but not visible light.
Just as a filter will only reflect a certain wavelength of color, sunscreen will only reflect the UV light but not the visible light.
To treat some diseases, X-rays and gamma rays are directed towards a target area of the body. This image shows gamma rays directed at a single diseased cell. The large gray circle represents an area of the body filled with normal cells.
Which of the following describes how the behavior of X-rays and gamma rays make these useful for treatment in the body?
They are reflected by the normal cells.
They are transmitted through the body.
They are absorbed by the skin.
They are blocked by the diseased cells.
If you wanted to use this as a model of how non-visible light is used to treat diseases, how would you improve this model? Select all of the possibilities.
The body has billions of cells, so I would make it clear that we are only showing a few.
I would show how a mix of red and green light interact with the diseased cells.
I would add more normal cells, to emphasize that the X-rays and gamma rays are in contact with many cells even though they are targeted only on certain ones.
I would show how the X-rays and gamma rays interact with other cells.
The prefix “infra” is defined as “below” and the prefix “ultra” can be defined as “beyond.” Why does the prefix infra make sense in the term “infrared” and why the prefix ultra makes sense in the term ultraviolet? Select all that apply.
Ultraviolet has a wavelength that is just beyond the wavelength of violet light.
Ultraviolet light is beyond what sunblock is able to absorb.
Infrared is below the temperature that can be recorded.
Infrared light has a wavelength just below the wavelength of red light.
