AnswersBHS-Physics B-CRUnit Test

Unit Test — Unit test Answers

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1
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Which statement describes characteristics of a convex lens?

A
A convex lens diverges light and curves inward.
B
A convex lens diverges light and curves outward.
C
A convex lens converges light and curves inward.
D
A convex lens converges light and curves outward.
2
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Felix made a chart listing the uses for two types of mirrors.Which headings belong in the chart?

Question illustration
A
X: PlaneY: Convex
B
X: Concave Y: Plane
C
X: ConvexY: Concave
D
X: ConvexY: Plane
3

A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens.The height of the image is cm.

Answer not available
4

The fuzzy edges of shadows are a result of .

Answer not available
5

A ray diagram shows an object placed between 2F and F of a convex lens. The image produced is

A
smaller than the object.
B
upright.
C
larger than the object.
D
virtual.
6

Remote controls rely on waves to carry signals and transmit information over short distances.

Answer not available
7

Which best describes the surface of a concave mirror?

A
It is flat.
B
It is textured.
C
It curves outward.
D
It curves inward.
8

Which would most likely cause specular reflection?

A
a pathway with rough rocks
B
a shiny, smooth leaf
C
a small patch of soil
D
a rough log
9

The distance between slits on a diffraction grating is 0.60 mm, and one of the angles of diffraction is 0.30°. The light forms a second-order bright band.

A
1047 nm
B
1571 nm
C
3142 nm
D
6284 nm
10

A 12-inch object is placed 30 inches in front of a plane mirror. A ray of light from the object strikes the mirror at a 45-degree angle.How tall is the image produced by the mirror?

A
12 inches
B
30 inches
C
24 inches
D
45 inches
11

A 15.0 cm object is 12.0 cm from a convex mirror that has a focal length of -6.0 cm. What is the height of the image produced by the mirror?

A
–5.0 cm
B
7.5 cm
C
-7.5 cm
D
5.0 cm
12

A ray diagram is shown.

Question illustration
A
It is virtual and in front of the mirror.
B
It is virtual and behind the mirror.
C
It is real and in front of the mirror.
D
It is real and behind the mirror.
13

What is the mirror formula for curved mirrors?

A
The inverse of f equals the inverse of d Subscript o Baseline times the inverse of d Subscript I Baseline.
Option A
B
The inverse of f plus the inverse of d Subscript o Baseline equals the inverse of d Subscript I Baseline.
Option B
C
The inverse of f equals the inverse of d Subscript o Baseline plus the inverse of d Subscript I Baseline.
Option C
D
The inverse of f equals the inverse of d Subscript o Baseline minus the inverse of d Subscript I Baseline.
Option D
14

What is the approximate wavelength of a light whose first-order bright band forms a diffraction angle of 45.0° when it passes through a diffraction grating that has 500.0 lines per mm?

A
236 nm
B
353 nm
C
943 nm
D
1414 nm
15

Which is a tool used by scientists to determine the composition of objects?

A
a hologram
B
a spectrometer
C
a wave front
D
a prism
16

Hilda looks at a CD and sees different colors. Which best explains why she sees different colors when light strikes a CD?

A
Some wavelengths of light are absorbed by the CD.
B
Different wavelengths of light bend at different angles.
C
The smooth surface of a CD causes wavelengths of light to scatter.
D
The rough surface of a CD causes wavelengths of light to bend at the same angle.
17

Byron draws a ray diagram to show how an image is produced by a lens.

Question illustration
A
The image should be smaller than the object.
B
The incident ray labeled X should continue moving in the same direction.
C
The image should be inverted instead of upright.
D
The incident ray labeled Y should continue moving in the same direction.
18

A ray diagram is shown.

Question illustration
A
It shows an incident ray.
B
It shows that the ray is changing direction.
C
It shows the ray passing through the boundary.
D
It shows that angles form between the rays and the normal.
19

greater than 45 degrees eachless than 45 degrees eachequal in measuredifferent in measure

A
greater than 45 degrees each
B
less than 45 degrees each
C
equal in measure
D
different in measure
20

The ray diagram shows a candle that is placed between the focal point and the mirror.

Question illustration
A
It will be smaller and upright.
B
It will be smaller and inverted.
C
It will be larger and upright.
D
It will be larger and inverted.

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