Physics- Chapter 20 Review

Physics- Chapter 20 Review

11th Grade

24 Qs

quiz-placeholder

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Physics- Chapter 20 Review

Physics- Chapter 20 Review

Assessment

Quiz

Physics

11th Grade

Medium

Created by

Hannah Boston

Used 2+ times

FREE Resource

24 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a property of the images formed by a plane mirror?

The image is located behind the mirror.

The images are a result of specular reflection.

The magnification is 1

the image distance is equal to the object distance (although it may be negative).

The image is smaller than the object.

Answer explanation

A plane mirror forms images that are the same size as the object.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Ray X strikes a flat mirror at an angle of θ = 28 degrees. What is the angle of incidence

62 °

150 °

120 °

90 °

28 °

Answer explanation

The angle of incidence is measured relative to the normal therefore in this case it is 90° - 28.0° = 62.0°.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 The radius of curvature of a spherical mirror is 70 cm. What is the focal length of the mirror?

110 cm

18 cm

70 cm

35 cm

4.0 cm

Answer explanation

f=R/2

70 cm/2=35 cm

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

On a bright and sunny day, a pedestrian notices his faint image in a shop window. Why did he see his image in the glass?

Some of the light passed through the glass.

Some of the light was reflected off of the glass.

Some of the light was red.

Some of the light was diffracted by the glass.

Some of the light was refracted by the glass.

Answer explanation

Some of the light was reflecting off of the surface of the glass, while some of the light was passing through the glass (and, presumably, a little bit of light was absorbed by the glass, too).

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Skiers will often wear sunglasses because much of the sunlight that strikes snow is

absorbed

diffracted

reflected

conducted

transmitted

Answer explanation

Much of the sunlight reflects off of snow, which is why snow appears bright white.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 40-cm-wide object seen through an optical device appears inverted and 20 cm wide. What is the magnification of the optical device?

2.0

0.50

-0.50

1.0

-1.0

Answer explanation

The size of the image is hi = 20 cm and the size of the object is ho = 40 cm.

−hi/ho=−20 cm/40 cm

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A solar panel measures 3.0 × 8.0 m in size and collects energy at a rate of 16800 W in full sunlight. What is the intensity of the sunlight falling on the panel? (Assume the panel is 100% efficient.)

24 W/m2

1900 W/m2

700 W/m2

260 W/m2

17000 W/m2

Answer explanation

Intensity is power per unit area, or P ÷ A. For this problem the area is 3.0 m × 8.0 m = 24 m2. The intensity is then 16800 ÷ 24 = 700 W/m2.

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