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P14 Light
1.
In the visible part of the electromagnetic spectrum what makes one colour different from another?
a) amplitude
b) wave speed
c) intensity
d) frequency and wavelength
2.
What term is used to describe reflection of light from a smooth surface in a single direction?
a) specular reflection
b) spectacular reflection
c) diffuse reflection
d) diffused reflection
3.
What term is used to describe reflection of scattered light from a rough surface?
a) specular reflection
b) diffused reflection
c) diffuse reflection
d) spectacular reflection
4.
What does a coloured filter do?
a) Adds coloured light to white light that is transmitted.
b) Changes the wavelength and so colour of light that is transmitted.
c) Absorbs some wavelengths (colours) of light and transmits other wavelengths (colours) of light?
d) Changes the frequency and so colour of light that is transmitted.
5.
What does the word opaque mean?
a) not transparent
b) not reflective
c) not coloured
d) not visible
6.
How can an opaque object be coloured?
a) It changes the wavelength of light rays falling on it.
b) It reflects its own light rather than the light falling on it.
c) Colour is added to the white light as it is reflected.
d) Some wavelengths (colours) are more strongly reflected than others.
7.
If an opaque object only reflects some wavelengths (colours) of light, what happens to the others?
a) They are transmitted.
b) They are absorbed.
c) They are converted to the reflected wavelengths.
d) The are returned to the light source.
8.
Which of the following correctly describes an object that looks white?
a) All wavelengths (colours) are reflected equally strongly.
b) Only white wavelengths are reflected.
c) Coloured waves are absorbed.
d) All wavelengths (colours) are shifted to white wavelengths.
9.
Which of the following correctly describes an object that looks transparent or translucent?
a) Some or all wavelengths are transmitted.
b) Only white wavelengths are transmitted.
c) Just the coloured waves are absorbed.
d) All transmitted wavelengths (colours) are shifted to white wavelengths.
10.
In the diagram which ray represents transmission?
a) A
b) B
c) C
11.
In the diagram which ray represents absorption?
a) A
b) B
c) C
12.
Why does a post box look red?
a) The paint absorbs red and green wavelengths and reflects blue wavelengths.
b) The paint absorbs blue and green wavelengths and reflects red wavelengths.
c) The paint transmits blue and green wavelengths and reflects red wavelengths.
d) The paint absorbs blue and green wavelengths and transmits red wavelengths.
13.
Why do bananas look yellow?
a) The skin reflects blue wavelengths and absorbs red and green wavelengths.
b) The skin absorbs blue wavelengths and reflects red and green wavelengths.
c) The skin absorbs blue wavelengths and transmits red and green wavelengths.
d) The skin transmits blue wavelengths and absorbs red and green wavelengths.
14.
What type of lens is shown in the diagram?
a) convex diverging lens
b) convex converging lens
c) concave diverging lens
d) concave converging lens
15.
Which letter indicates the focal point?
a) A
b) B
c) C
d) D
16.
Which of the following is the focal length of the lens?
a) A to C
b) A to D
c) B to D
d) C to D
17.
What type of image is formed when this type of lens focusses a distant object?
a) real and upright
b) virtual and inverted
c) virtual and upright
d) real and inverted
18.
What type of lens is shown in the diagram?
a) convex converging lens
b) concave diverging lens
c) convex diverging lens
d) concave converging lens
19.
Which letter indicates the focal point?
a) A
b) B
c) C
d) D
20.
What type of image is always formed by this type of lens?
a) real
b) exaggerated
c) inverted
d) virtual
21.
In the ray diagram which of the following describes the image?
a) real and inverted
b) upright and diminished
c) magnified and virtual
d) diminished and real
22.
A bird is observed through a pair of binoculars with a magnification of 8. It appears to be 1.2m tall. Use the equation, magnification = image height /object height, to calculate the height of the bird.
a) 20 cm
b) 25 cm
c) 15 cm
d) 30 cm
23.
In a ray diagram a ray that goes through the centre of the lens will…..
a) be refracted towards the principal axis.
b) be refracted to pass through the principal focus.
c) leave the lens parallel to the principal axis.
d) pass through in a straight line without changing direction.
24.
In a ray diagram a ray that arrives at the lens parallel to the principal axis will….
a) be refracted towards the principal axis.
b) pass through in a straight line without changing direction.
c) leave the lens parallel to the principal axis.
d) be refracted to pass through the principal focus.
25.
In the ray diagram which of the rays has been correctly drawn?
a) A
b) B
c) C
d) D
26.
In the ray diagram which of the rays has been correctly drawn?
a) A
b) B
c) C
d) D
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