Arrange the electromagnetic waves from the shortest to longest wavelength.
infrared, visible, ultraviolet
Describe the image produced by a concave mirror used by a dentist to clearly see the images of our teeth.
large, upright, closer and virtual view of our teeth
What can you say about the range of wavelength of the visible light if the spectrum is consist only of radio wave, visible light, and gamma wave?
Visible light has the shortest range of wavelength in the spectrum.
It is an optical device used to see very far or distant objects clearly.
telescope
Electromagnetic waves have the same speed but different: (2 words)
wavelength and frequency.
How do you describe the image produced by a simple microscope?
an enlarged and virtual image
A man 1.30-m tall stands 5.20 meters from a concave mirror. If the image could be formed on a screen 15.0 cm from the mirror, what is the size of the image?
14.6 cm
What happens to the light rays that reflect from the mirror in the illustration?
diverge so that you see a larger area
A converging lens is used to form a sharp image of a lighted candle. What will happen to the image if the lower half of the lens is covered by a piece of paper?
Image will become dimmer.
If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, what should be the required length of the mirror?
equal to the height of the man
How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves?
infrared waves have longer wavelength
How much larger will your classroom seem to appear if the entire two adjacent walls of your classroom consist of plane mirrors?
3x larger
Describe the relationship between energy and frequency of the electromagnetic radiations.
as frequency increases so as the energy
What are the characteristics of the image formed by an object placed between the focal point and optical center of a converging lens?
virtual and upright
What is the distance of your image from you if you stand 1.5 m in front of a plane mirror?
3.0 m
Where an object should be placed in front of a concave mirror so that the image will have the same size as the object?
at the center of curvature
Gamma rays are highly penetrating waves. Which of the following will describe the beneficial application of gamma rays to ship line industry?
gamma rays are highly penetrating that can detect metal defect
While testing an electric motor that you made in school, you removed one of the dry cells, what happens to its commutator?
it will turn slower
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