1. Motion, forces and energy

1.1 Physical quantities and measurement techniques

1.2 Motion

1.3 Mass and weight

1.4 Density

1.5.1 Effects of forces

1.5.2 Turning effect of forces

1.5.3 Centre of gravity

1.6 Momentum

1.7.1 Energy

1.7.2 Work

1.7.3 Energy resources

1.7.4 Power

1.8 Pressure

2. Thermal physics

2.1.1 States of matter

2.1.2 Particle model

2.1.3 Gases and the absolute scale of temperature

2.2.1 Thermal expansion of solids, liquids and gases

2.2.2 Specific heat capacity

2.2.3 Melting, boiling and evaporation

2.3.1 Conduction

2.3.2 Convection

2.3.3 Radiation

2.3.4 Consequences of thermal energy transfer

3. Waves

3.1 General properties of waves

3.2.1 Reflection of light

3.2.2 Refraction of light

3.2.3 Thin lenses

3.2.4 Dispersion of light

3.3 Electromagnetic spectrum

3.4 Sound

4. Electricity and magnetism

4.1 Simple phenomena of magnetism

4.2.1 Electric charge

4.2.2 Electric current

4.2.3 Electromotive force and potential difference

4.2.4 Resistance

4.2.5 Electrical energy and electrical power

4.3.1 Circuit diagrams and circuit components

4.3.2 Series and parallel circuits

4.3.3 Action and use of circuit components

4.4 Electrical safety

4.5.1 Electromagnetic induction

4.5.2 The a.c. generator

4.5.3 Magnetic effect of a current

4.5.4 Force on a current-carrying conductor

4.5.5 The d.c. motor

4.5.6 The transformer

5. Nuclear physics

5.1.1 The atom

5.1.2 The nucleus

5.2.1 Detection of radioactivity

5.2.2 The three types of nuclear emission

5.2.3 Radioactive decay

5.2.4 Half-life

5.2.5 Safety precautions

6. Space physics

6.1.1 The Earth

6.1.2 The Solar System

6.2.1 The Sun as a star

6.2.2 Stars

6.2.3 The Universe

IGCSE Physics 3.2.3 Thin lenses Question Bank

[Maximum number: 1]

The diagram shows a thin converging lens with principal focuses at $F_{1}$ and $F_{2}$ .

A small light source is placed at $F_{1}$ . A beam of light from the source passes through the lens. Which statement correctly describes the beam of light emerging from the lens?

The beam converges to $\mathrm{F}_{2}$ .

The beam converges to a point to the right of $F_{2}$ .

The beam diverges from a point to the left of $F_{1}$ .

The beam travels parallel to the principal axis.

[Maximum number: 1]

Each point F is one focal length from the centre of the lens. Each point 2F is two focal lengths from the centre of the lens.

Which diagram shows a converging lens being used as a magnifying glass?

image at infinity

[Maximum number: 1]

An object O is placed at point P near to a thin converging lens. The diagram shows three rays from the top of O passing through the lens. Each point F is one focal length from the centre of the lens. Each point 2F is two focal lengths from the centre of the lens.

The object O is moved to point Q on the diagram.
Which type of image is produced when the object O is at point Q ?

inverted and the same size as the object

inverted and enlarged

upright and the same size as the object

upright and enlarged

[Maximum number: 1]

The diagram shows part of a ray diagram that demonstrates the formation of a virtual image Y of object X by a converging lens.

One ray of light from X is shown approaching the lens.
Which arrow shows the direction of this ray as it leaves the lens?
A

C
D

[Maximum number: 1]

A person uses a magnifying glass to look at a stamp.
Which ray diagram shows a thin converging lens being used to do this?

[Maximum number: 7]

The lens in a magnifying glass is a converging lens.

(a)

Fig. 4.1 shows the lens of the magnifying glass, its two focal points, $F_{1}$ and $F_{2}$ , and its principal axis.

Fig. 4.1

[ 4 ]

(i)

State what is meant by 'focal point'.

[ 2 ]

(ii)

A student using the magnifying glass sees a magnified image of an object.

On Fig. 4.1, mark:
- a point X on the principal axis for a possible position of the object
- a point E for a possible position of the student's eye.

[ 1 ]

(iii)

Underline two words in the list that describe the image produced in (a)(ii).
inverted
real
upright
virtual

[ 1 ]

(b)

Converging lenses are used in spectacles (glasses) to correct one problem with vision.

State the name of the problem and explain how a converging lens is used to correct it. You may draw a diagram.
name of problem:

[ 3 ]

[Maximum number: 1]

A converging lens is used as a magnifying glass to view an object.
Which statement is correct?

The image is inverted.

The image is nearer the lens than the object.

The image is the same size.

The image is virtual.

[Maximum number: 1]

The incomplete ray diagram shows two rays of light that have passed from one point on an object through a thin converging lens.

Which type of image is formed, and on which side of the lens is it formed?

type of image

which side of lens

real

on the left

real

on the right

virtual

on the left

virtual

on the right

[Maximum number: 1]

A converging lens is used to make an image on a screen.

What type of image is formed on the screen?

real and inverted

real and upright

virtual and inverted

virtual and upright

[Maximum number: 1]

A thin converging lens has a focal length f. An object 0 is placed to the left of the lens, as shown.

Where is the image formed and how does its size compare to the object?

image position

image size

on the opposite side of the lens to the object

larger than the object

on the opposite side of the lens to the object

smaller than the object

on the same side of the lens as the object

larger than the object

on the same side of the lens as the object

smaller than the object

0 selected

Question 18

Question 18

Question 19

Question 19

Question 19

Question 4

Question 4(a)

Question 4(a)(i)

Question 4(a)(ii)

Question 4(a)(iii)

Question 4(c)

Question 20

Question 20

Question 20

Question 20