PHY BK ANS 3A

 Essay about PHY BK ANS 3A

3A Wave Motion I actually

1

Part 1

Expression of Light

Representation of Light

Practice 1 . 1 (p. 5)

1

C

2

C

3

Luminous objects: candlestick flame, lighted

(c)

lights and the sunshine

Non-luminous objects: books, blackboards

and the moon

(Or different reasonable answers)

4

(a) Divergent

(b) Divergent

(c)

5

your five

Parallel

Perspective of chance = 90п‚° пЂ­ 25п‚° = 65п‚°

Angle between incident ray and the

(a)

reflected beam

= 65п‚° + 65п‚° = 130п‚°

6

(a) Angle of incidence sama dengan 90п‚° пЂ­ 30п‚° sama dengan 60п‚°

(b)

(b)

(c)

Angle of reflection pertaining to the final shown

ray

=z

= 90п‚° пЂ­ sumado a

Practice 1 . 2 (p. 10)

sama dengan 90п‚° пЂ­ x

1

C

a couple of

A

sama dengan 90п‚° пЂ­ 60п‚°

three or more

C

sama dengan 30п‚°

4

(a) Perspective of occurrence = 90п‚° пЂ­ 40п‚° = 50п‚°

7

The of glossy paper is usually flat and lightweight is

mirrored regularly. The large amount of sunshine

(b) Viewpoint of reflection

reflected by glossy conventional paper makes it tough

= angle of incidence = 50п‚°

to read the prints.

New Senior Supplementary Physics at the job

1

пѓ“ Oxford University Press 2009

3A Say Motion We

8

Chapter 1

(a) When the area of the water is ruffled,

8

Expression of Light

(a)

diffuse expression occurs to generate a

distorted photo.

(b) John's explanation is wrong. The

reflection of light still obeys the laws of

expression. The seite an seite rays happen to be reflected

to different guidelines because the

habituel at several positions level

towards diverse directions.

Practice 1 . several (p. 21)

1

A

2

Deb

3

A

4

C

(b) The image is of a similar size since the

target.

9

your five

6

(a) Height of her graphic = 1 ) 4 meters

(b) Virtually any two of the following:

virtual;

since far behind the reflect as the lady is in

front side;

of the same size as the girl;

erect;

laterally inverted.

several

(a)& (b)

10

In case the photograph can be taken at an angle to the

reflection surface, much less light will be reflected by simply

the reflection back to the camera and a better

photo will be used.

11

(a) Distance environment = 3 m + 3 meters

=6m

(b) No . It is because the camera focuses

around the mirror rather than the image. The

mirror is front in the image to be

photographed.

Fresh Senior Supplementary Physics at your workplace

2

пѓ“ Oxford University Press 2009

3A Influx Motion My spouse and i

12

Chapter 1

(a)

Reflection of Light

6

C

7

M

8

(HKCEE 2004 Daily news II Q13)

9

(HKCEE 2007 Paper II Q11)

Conventional (p. 26)

1

(a) The angle of reflection can be equal to the

angle of incidence. The incident beam, the

mirrored ray as well as the normal every lie in the

same aircraft.

(b) If he can simply see his feet, the length

(b) (i)

between the bottom level of the mirror and the

1 . 5

floor =

= 0. 75 m.

two

(c)

the rough area, the banal

point for different directions. (1A)

Yes, he can even now see his feet.

Once parallel rays of light fall

onto the surface, their sides of

chance are different.

Multiple-choice (p. 25)

A

2

B

three or more

A

5

D

five

B

(1A)

(ii) Several points of occurrence on

Modification exercise one particular

1

Yes.

(1A)

(1A)

By the solution in (b)(i), they have

distinct angles of reflection.

Therefore , they are mirrored

towards diverse directions. (1A)

2

(a) (Correct image)

(1A)

(b) (Light ray from A to mirror part

(1A)

The angles marked in the determine above are typical

(Light ray from looking glass surface towards the

equal to 40п‚°. Therefore ,

eye)

пЃ± = 40п‚° п‚ґ 2 = 80п‚°

Fresh Senior Second Physics at Work

3

(1A)

пѓ“ Oxford University Press 2009

3A Wave Motion I

three or more

Chapter you

Reflection of Light

(a)

1m

2m

B

C'

G

E

Plug

E'

C

A

Flower

As proven in the determine above, пЃ„OAB

пЃ„ABC' ~ пЃ„E'DC' (AAA)

and пЃ„OFE are similar triangles (AAA).

ABS OH you

пЂЅ

пЂЅ

By portion,

FE SMAT 2

1

AB sama dengan п‚ґ two = one particular m

(1A)

2

MY OH MY OH you

Also,

пЂЅ

пЂЅ

FG OG two

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