A magnifying glass is an example of a _ lens.

Aconverging
Bdouble-concave
Cplano-convex
Dplano-concave

Student Answer: C

Answer: Incorrect

Reference:

If the distance from a converging lens to the object is less than the focal length of the lens, the image will be _ the object.

Areal, inverted, and smaller than
Bvirtual, upright, and larger than
Cvirtual, upright, and smaller than
Dreal, inverted, and larger than

Student Answer: A

Answer: Incorrect

Reference:

Which of the following values represents an index of refraction of an actual material?

A.25
B0
C.5
D1.25

Student Answer: C

Answer: Incorrect

Reference:

Which, if any, of these mirrors can produce a real image?

APlane
BConvex spherical
CNo mirrors can produce a real image.
DConcave spherical

Student Answer: A

Answer: Incorrect

Reference:

When white light is incident on a prism, which one of the resulting color components will have the lowest index of refraction?

AYellow
BBlue
CGreen
DOrange

Student Answer: C

Answer: Incorrect

Reference:

Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps?

AFluorescent lamps operate at a higher temperature than incandescent lamps.
BFluorescent lamps are more efficient than incandescent lamps.
CFluorescent lamps dissipate more energy as light instead of heat than incandescent lamps.
DFluorescent lamps produce light with less glare than incandescent lamps.

Student Answer: B

Answer: Incorrect

Reference:

Which of the following is not a characteristic of electromagnetic waves?

AThey can travel through a vacuum.
BThey can be refracted.
CThey can be reflected.
DThey can travel at various speeds through any one material.

Student Answer: B

Answer: Incorrect

Reference:

A ray at which angle would produce the most glare?

A37 degrees
B70 degrees
C25 degrees
D59 degrees

Student Answer: B

Answer: Incorrect

Reference:

Which of the following statements is true of glare control?

AUsing bulbs that aren't frosted will help to diffuse the light and reduce glare.
BSpecial care must be taken to prevent glare where a low illuminance is required.
CRedirecting lamp fixtures and adjusting bulb types will do little to control glare.
DIndirect lighting is preferred to direct lighting because it produces less glare.

Student Answer: C

Answer: Incorrect

Reference:

Which of the following objects uses two converging lenses to produce two images, the second of which is virtual, magnified, and inverted?

ASlide projector
BCompound microscope
CCorrective eyeglasses
DCamera

Student Answer: D

Answer: Incorrect

Reference:

The light intensity of a source is 100 candelas. The illuminance on a surface is 4 lux. How far is the surface from the source?

A4 meters
B6 meters
C5 meters
D7 meters

Student Answer: B

Answer: Incorrect

Question

rainbow771 rainbow771

27-05-2016
Chemistry

Answered

A magnifying glass is an example of a _ lens.

Aconverging
Bdouble-concave
Cplano-convex
Dplano-concave

Student Answer: C

Answer: Incorrect

Reference:

If the distance from a converging lens to the object is less than the focal length of the lens, the image will be _ the object.

Areal, inverted, and smaller than
Bvirtual, upright, and larger than
Cvirtual, upright, and smaller than
Dreal, inverted, and larger than

Student Answer: A

Answer: Incorrect

Reference:

Which of the following values represents an index of refraction of an actual material?

A.25
B0
C.5
D1.25

Student Answer: C

Answer: Incorrect

Reference:

Which, if any, of these mirrors can produce a real image?

APlane
BConvex spherical
CNo mirrors can produce a real image.
DConcave spherical

Student Answer: A

Answer: Incorrect

Reference:

When white light is incident on a prism, which one of the resulting color components will have the lowest index of refraction?

AYellow
BBlue
CGreen
DOrange

Student Answer: C

Answer: Incorrect

Reference:

Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps?

AFluorescent lamps operate at a higher temperature than incandescent lamps.
BFluorescent lamps are more efficient than incandescent lamps.
CFluorescent lamps dissipate more energy as light instead of heat than incandescent lamps.
DFluorescent lamps produce light with less glare than incandescent lamps.

Student Answer: B

Answer: Incorrect

Reference:

Which of the following is not a characteristic of electromagnetic waves?

AThey can travel through a vacuum.
BThey can be refracted.
CThey can be reflected.
DThey can travel at various speeds through any one material.

Student Answer: B

Answer: Incorrect

Reference:

A ray at which angle would produce the most glare?

A37 degrees
B70 degrees
C25 degrees
D59 degrees

Student Answer: B

Answer: Incorrect

Reference:

Which of the following statements is true of glare control?

AUsing bulbs that aren't frosted will help to diffuse the light and reduce glare.
BSpecial care must be taken to prevent glare where a low illuminance is required.
CRedirecting lamp fixtures and adjusting bulb types will do little to control glare.
DIndirect lighting is preferred to direct lighting because it produces less glare.

Student Answer: C

Answer: Incorrect

Reference:

Which of the following objects uses two converging lenses to produce two images, the second of which is virtual, magnified, and inverted?

ASlide projector
BCompound microscope
CCorrective eyeglasses
DCamera

Student Answer: D

Answer: Incorrect

Reference:

The light intensity of a source is 100 candelas. The illuminance on a surface is 4 lux. How far is the surface from the source?

A4 meters
B6 meters
C5 meters
D7 meters

Student Answer: B

Answer: Incorrect

Verified Answer :

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W0lf93 W0lf93 · Answer 1 · 2017-08-10T20:57:34-04:00

The answer to question 2 is C. A magnifying glass is an example of a plano-convex lens, where one side of the lens is flat and the other is a convex curve. The answer to question 3 is either B or C. A converging lens is curved on both sides and so the rays of light coming out of it converge at a point, which is known as the focal point. When the object is inside the focal point, the image is real and inverted. If it is inside the focal point, the image is virtual and upright. Therefore the image in this question will be upright. The focal length is the distance between the image that is being magnified and the centre of the magnifying lens. A real image can only be formed when the object is further away from the lens than the focal length. Therefore, in this question, the image is virtual, as the object is closer to the lens than the focal length. The answer to question 4 is D because the index of refraction cannot be less than 1. The answer to question 5 is D because only concave mirrors can produce real images; other types produce virtual images. For question 6, the answer is D. In the rainbow, each of the colours refracts at a slightly different angle; red has the smallest refractive index and violet the largest. Of the options, orange is closest to red. For question 12, A is the answer. A higher operating temperature is not a reason fluorescent lamps are better than incandescent lamps because they have a lower operating temperature. Question 15: all of these are characteristics of different electromagetic waves. For question 18, B is true - special care must be taken when low illuminance is required to reduce glare. The answer to question 19 is B - a compound microscope makes use of two lenses. For question 20, the answer is 5 meters away. The illuminance (E) is equal to light intensity (I) divided by the square distance from the light source (d). Therefore, 4 = 100/d squared. To switch this around, d squared is equal to 100/4 = 25. Then find the square root of 25, which is 5.