dny answers NOT recorded on the Scantron answer page will NOT be counted 1. Ligh
ID: 1795328 • Letter: D
Question
dny answers NOT recorded on the Scantron answer page will NOT be counted 1. Light is an electromagnetic wave that is longitudinal. A) True or B) False 2. A convex mirror can be used to produce both real and virtual images A) True or B) False 3. If a spherical mirror has a positive focal length, it must concave A) True or B) False 4. The image produced by a spherical lens has a magnification +1.5, so the image must be real A) True or B) False 5. The equation: nismo, = nsie, is known as Brewster's Law. A) True or B) False In the diagram, the large arrow represents an object and the small arrow is the center of curvature of the mirror This arrangement will produce an erect image to the - 6. right of the mirror that is and larger than the object. A) True or B) False The image produced by a magnifying glass is vertual. A) True or B) False 8. Indexes of refraction are always greater than one A) True or B) FalseExplanation / Answer
1) False
Because Light and other type of electromagnetic waves are transverse in nature (not longitudinal).
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2) False
Convex mirror always forms virtual image.
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3) False
It depende on the sign convention you are using. If you use the right hand side to be positive, the positive focal length indicates concave mirror. But if you assume the left hand side to be positive then positive focal length would indicate convex mirror.
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4) False
The positive magnification occurs for virtual image in lens.
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5) False
This is Snell's law applicable for two different medium where the light passes through.
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6) False
This is a concave mirror. And for a concave mirror, the image is formed on the right hand side only if the object is placed between the pole and the principle focus.
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7) False
The magnifying glass uses a convex lens which is a converging lens. It produces a virtual image till the object is within its focal length. Else it produces real image.
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8) True
The refractive index of a medium is the ratio of speed of light in vaccum (c) to the speed of light in the medium(v). As the speed of light in vaccum c = 3 x 108 m/s is highest so the refractive index smaller than 1 is not possible.
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