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5.2 Understanding Refraction of Light

2) Diagram 3 shows a men taking air to spear a fish.

Diagram 3

(a) The spear fails to hit the fish when it was thrown along the

direction of his aim.

(i) State two reasons, in terms of the propagation of light, why the

spear did not hit the fish._____________________________________________________

(2 mark)

(ii) Draw light rays to show the position of the fish as seen by the

man.

(2 mark)

(b) The fish is tat a depth of 1.2m from the surface of the waterWhat is the distance of the image of the fish below the surface of the

water?

[Refractive index of water = 1.33]

(2 mark)

[Kedah No .3]

SPM

Physics

2014

F4

3

Form 4 Chapter 5:

Refraction of Light

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SPM

Physics

2014

F4

4

Form 4 Chapter 5:

Refraction of Light

3) Diagram 5.1 and Diagram 5.2 show a phenomenon of light occurs when

the light propagates between two mediums with different density.

Medium B is denser than medium A.

(a ) What is the name given to angle labelled i?

__________________________________________________________

( 1mark)

(b) Explain why angle r is smaller than angle i.

__________________________________________________________

__________________________________________________________(1 mark)

(c) Based on Diagram 5.1 and 5.2,

(i) Compare the magnitude of angle I

_________________________________________________________

(1 mark)

(ii) Compare the magnitude of angle r_________________________________________________________

(1 mark)

(iii) Relate between the angle of r and the density of an object.

_________________________________________________________

(1 mark)

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(iv) The refractive index, n is given as a ratio of sin I to sin r, compare the

refractive index, n between medium A and medium B.

______________________________________________________________

(1 mark)

(d) Base from your answers in 5(c) state an appropriate relation between the

refractive index, n and the density of an object.

______________________________________________________________

(1 mark)

(e) Name the law of science involved in the phenomena of light as shown on thediagram.

[Melaka No.5]

SPM

Physics

2014

F4

5

Form 4 Chapter 5:

Refraction of Light

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4. Figure (a) below shows a ray of light being refracted at a glass surface.

Figure (b) shows the incident ray at a different angle.

(a) (i) What is mean by refractive index?

_____________________________________________________

_____________________________________________________

(1 mark)

(ii) Calculate the angle that the refracted ray makes wi9th the normal in

figure (b) above.

(2 mark)

[Times No. 4)

SPM

Physics

2014

F4

6

Form 4 Chapter 5:

Refraction of Light

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5) Diagram 7.1 shows the image of a point 2 metre marked in a swimming

pool as seen by an observer standing near the pool. The point appears

shallower than the real depth.

(a) (i) Name the light phenomenon that cause the observation.

_______________________________________________________

(1 mark)

(ii) Explain how the image of the 2 metre marked appear shallower?

_______________________________________________________

_______________________________________________________\

_______________________________________________________

(3 mark)

(b) The refractive index of the water is 1.33.

Calculate the apparent depth of the point 2 metre marked.

(2 mark)

SPM

Physics

2014

F4

7

Form 4 Chapter 5:

Refraction of Light

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[Terengganu No . 7)

(c) Diagram 7.2shows a reflector made by a student. The light rays reflected by

the plane mirror to heat the water in a cylinder container.

The heat produced by the reflector is not enough to increase the water

temperature to a desired value. Some modifications need to be done themirror to increase the water temperature.

State the suitable modification and give one reason for each modification.

(i) Type of the mirror.

_______________________________________________________

Reason.

_________________________________________________________

(2 mark)

(ii) Diameter of the mirror.

_________________________________________________________

Reason

_________________________________________________________

(2 mark)

SPM

Physics

2014

F4

8

Form 4 Chapter 5:

Refraction of Light

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SPM

Physics

Form 4 Chapter 4:

Heat (Boyles Law)

2014

F4

11

7. Diagram 7 shows an air bubble released by a diver at position X which then rises

up to position Y.

Diagram 7

(a) Based on the observation of the air bubble in Diagram 7,

(i) compare the volume of the air bubble at X and Y

[1 mark]

(ii) compare the pressure of the air bubble at X and Y

[1 mark]

(iii) relate the changes of the pressure and the volume of the air bubble

at X and Y

[1 mark]

(iv) Name the physics law which is involved in the above observation.

[1 mark]

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SPM

Physics

Form 4 Chapter 4:

Heat (Boyles Law)

2014

F4

12

(v) State one assumption made in the physics law in (a)(iv) above.

[1 mark]

(b) Using your answer in (a)(iii) above, sketch the graph of pressure against

volume of the gas.

[1 mark]

[Perak NO. 3]

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SPM

Physics

Form 4 Chapter 3:

Gss Pressure

2014

F4

5. Diagram 4 shows a set up apparatus used to investigate the relationship between

pressure and temperature of air at constant volume and mass.

Diagram 4

(a) Based on Diagram 4, choose the correct measuring instrument labeled X.

Tick ( / ) the correct answer in the box provided.

Barometer

Bourdon gauge

Manometer

[1 mark]

(b) State the physical quantity measured by X.

________________________________________________________

[1

mark]

(c) (i) What will happen to the reading of X when the temperature

increases?

____________________________________________________

[1

mark]

[SBP NO. 4]9

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SPM

Physics

Form 4 Chapter 3:

Atmospheric Preesure

2014

F4

9.

8

Diagram 9.1 shows the Foothill and Mountain peak of Mount Kinabalu, Sabah.

Diagram 9.1

(a) What is meant by atmospheric pressure?

[1 mark]

(b) Using Diagram 9.1, compare the altitude between mountain peak and foothill, the

air pressure at mountain peak and foothill and density of air between the two

altitudes.

State the relationship between the altitude and the air pressure. Hence, deduce a

relationship between the atmospheric pressure and density of air.

[5 marks]

(c) Diagram 9.2 shows a drinking straw in a glass of water.

Diagram 9.2

Explain how to drink the water by using the drinking straw.[4 marks]

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SPM

Physics

Form 4 Chapter 3:

Forces and Pressure (P2)

2014

F4

8

(d) Malaysian Hiking Club is going to organise a climbing expedition to

Mount Everest. As a team advisor, you are required to set designs of

equipments are needed for all team members so that, they canwithstand to extreme cold weather along the expedition, hence help

them to reach summit of Everest safely.

The summit temperature averages about 36C, thin air and land

floor covered by ice and glacier.

Using your knowledge of forces, pressure, temperature and

properties of matter, state and explain the suggestions based on the

following aspects:

(a) The attire of the climber

(b) The type of material used for backpack

(c) The way to breathe in high altitudes

(d) The design of climbing equipment[10 marks][Pahang NO.9]

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SPM

Physics

Form 4 Chapter 3:

Forces and Pressure (P2)

2014

F4

1.

1

Diagram 3.1 shows a metal block hanging from a spring balance.

Diagram 3.2 shows the metal block immersed in eureka can filled with water.

Diagram 3.1 Diagram 3.2

(a) What is the mass of the metal block?

[1 mark]

(b) Based on Diagram 3.2:

(i) What is the apparent loss in weight of the metal block?

[1 mark]

(ii) Explain why the spring balance shows a smaller reading.

[1 mark]

Section A

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SPM

Physics

Form 4 Chapter 3:

Forces and Pressure (P2)

2014

F4

(c) Complete the following sentence by underlining the correct words.

The weight of the water displaced in Diagram 3.2 is

(less than, equal to, more than) the apparent loss in weight of the metal block.

[1 mark]

(d) Calculate the volume of water displaced

[Density of water = 1000 kgm, g= 10 N kg1]

[2 mark]

[Kedah NO.3]1

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SPM

Physics

Form 4 Chapter 3:

Forces and Pressure (P2)

2014

F4

[Kedah NO.3]1

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SPM

Physics

Form 4 Chapter 3:

Forces and Pressure (P2)

2014

F4

[Kedah NO.3]1

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SPM

Physics

Form 4 Chapter 2:

Forces and Motion (P2)

Impulsive Force

9.Diagram 2.1 shows two identical plasticine balls before being dropped from

same height.

Diagram 2.2 shows the situation when they hit a wood and a sponge,

Diagram 2.1

Diagram 2.2

(a) What is the meaning of impulsive force?

[1 mark]

(b) (i) Which of Diagram 2.2 shows a smaller impulsive force?

[1 mark]

(ii) Which statement correctly describes the time of impact of plasticine. Mark () in the correct box.

Time of impact on wood greater than on sponge

Time of impact on sponge greater than the wood.[1 mark]

2014

F4

(c)A 0.35 kg hockey ball move from rest with velocity 15 ms1after been hitting. The time impact is 0.20 s.

What is the impulsive force on hockey ball?

[2 marks]

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SPM

Physics

Form 4 Chapter 2:

Motion graph

10. Diagram 1 shows a velocity against time graph for a motion.

Diagram 1

(a) Velocity can be define as Take () the correct answer in the box below.

Rate of change of distance

Rate of change of displacement

[1 mark]

(b) Based on Diagram 1,

(i) What type of motion during the first 10 second?

[1 mark]

(ii) Mark with P, a region of deceleration.

[1 mark]

(c) State other physical quantity that can be derived from the graph.

[1 mark]

[Melaka NO.1]

2014

F4