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Alhussan Physics — Stage 8

Chapter 6: Forces, Motion and Pressure

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Chapter 7: Light

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Chapter 8: Magnetism and Electromagnets

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Chapter 9: Energy Resources

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Chapter 10: The Earth in Space (Galaxies and Asteroids)

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Quiz

Physics 7.8 Colour — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Pixels on screens (millions). Which has the smallest value?
Dr Dabour Hub Academy - figure 1
4K
HD
8K
Full HD
2.
Red + blue light makes ____.
yellow
cyan
green
magenta
3.
Green + blue light makes:
Yellow
Red
Cyan
Magenta
4.
A screen is 3840 × 2160 pixels. Total pixels?
8,294,400
2
24,883,200
6000
5.
Red + green + blue light makes ____.
black
white
grey
brown
6.
Which statement is correct?
Magenta filter passes green.
A red filter adds red light.
Colour blindness is due to faulty cone cells.
Mixing paint is the same as mixing light.
7.
Which statement is correct?
All three primaries make black.
Rod cells detect colour.
Primary colours of light are red, yellow, blue.
Stage lights use coloured filters.
8.
People with colour blindness (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
9.
People with colour blindness (%). About how many times bigger is Men than Women?
Dr Dabour Hub Academy - figure 3
24.4
8.1
32.6
16.3
10.
True or false? Magenta filter passes green.
True
False
11.
People with colour blindness (%). What is the value for Women?
Dr Dabour Hub Academy - figure 4
0.7
5.1
3.4
11.4
12.
A screen is 1280 × 1080 pixels. Total pixels?
2360
13,824,000
1,382,400
4,147,200
13.
White light through a red filter then a green filter gives:
Red
Yellow
No light (black)
Green
14.
True or false? A green filter makes white light look green.
True
False
15.
From the cards, which two colours make cyan?
Dr Dabour Hub Academy - figure 5
Red + blue
Red + green
Yellow + blue
Green + blue
16.
Pixels on screens (millions). About how many times bigger is 8K than HD?
Dr Dabour Hub Academy - figure 6
55.3
73.8
36.9
18.4
17.
True or false? Yellow + blue light makes white.
True
False
18.
8% of 250 men are colour blind. How many?
20
2000
230
31
19.
Which statement is NOT correct?
Yellow + blue light makes white.
Cone cells detect colour.
Every colour of light can be made from three primaries.
Primary colours of light are red, yellow, blue.
20.
People with colour blindness (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 7
A
B
C
D
21.
Sensitivity of cone cells at wavelengths. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
22.
Which is the correct definition of “Colour blindness”?
Light-sensitive chip in a camera.
Observations supporting or rejecting ideas.
Faulty cone cells.
Retina cells sensitive to red, green or blue.
23.
Each pixel has 3 sub-pixels. Sub-pixels in 8.3 million pixels?
8.3 million
2.8 million
24.9 million
11.3 million
24.
Every colour of light can be made from ____ primaries.
three
seven
two
five
25.
True or false? The primary colours of light are red, green and blue.
True
False
26.
A filter passes 90% of 200 units of red light. Red passed?
2 units
110 units
18,000 units
180 units
27.
Pixels on screens (millions). Which has the greatest value?
Dr Dabour Hub Academy - figure 9
8K
Full HD
HD
4K
28.
People with colour blindness (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 10
A
B
C
D
29.
Which term matches this definition? “Red + blue light.”
Pixel
Magenta
Particle model of light
Photon
30.
Light passing through filters (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
31.
Filters ____ colours from white light.
subtract
create
multiply
add
32.
Light passing through filters (%). What is the total of all the values?
Dr Dabour Hub Academy - figure 12
80
100
85
90
33.
Which statement is NOT correct?
A green filter makes white light look green.
Red + green light makes brown.
Mixing paints is different from mixing light.
A red filter lets through only red light.
34.
A screen is 1920 × 1080 pixels. Total pixels?
2,073,600
2
3000
6,220,800
35.
People with colour blindness (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 13
A
B
C
D
36.
Which statement is correct?
A green filter makes white light look green.
Magenta filter passes green.
A red filter adds red light.
Rod cells detect colour.
37.
Sensitivity of cone cells at wavelengths. At what value of "Wavelength (nm)" is "Response (%)" smallest?
Dr Dabour Hub Academy - figure 14
550
450
400
500
38.
Red + blue light makes ____.
cyan
magenta
green
yellow
39.
A filter passes 85% of 400 units of red light. Red passed?
5 units
315 units
34,000 units
340 units
40.
Which statement is correct?
Red then blue filter gives purple.
Cyan + red light makes white.
Primary colours of light are red, yellow, blue.
All three primaries make black.
41.
Which term matches this definition? “Green + blue light.”
Cyan
Pupil
Yellow light
Iris
42.
Pixels on screens (millions). What is the value for Full HD?
Dr Dabour Hub Academy - figure 15
2.1
33.2
8.3
0.9
43.
Red + green light makes ____.
magenta
yellow
white
cyan
44.
Which statement is NOT correct?
Stage lights use coloured filters.
Red + green light makes yellow.
Cone cells detect colour.
Filters add colours.
45.
True or false? Cone cells detect colour.
True
False
46.
Sensitivity of cone cells at wavelengths. What is the value of "Response (%)" when "Wavelength (nm)" is 650?
Dr Dabour Hub Academy - figure 16
11
39
98
41
47.
People with colour blindness (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 17
A
B
C
D
48.
Light passing through filters (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 18
A
B
C
D
49.
True or false? Red + green light makes yellow.
True
False
50.
Pixels on screens (millions). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 19
A
B
C
D
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Part of Chapter 7: Light — see every lesson and quiz in this unit.
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