Bece Model Questions Vol1 2025 Cultural And Creative Arts Question 5

Practice practical question 5 from the 2025 Bece Model Questions Vol1 Cultural And Creative Arts examination. This question covers Colour mixing, Colour wheel, Spectrophotometry, Error analysis .

Bece Model Questions Vol1 2025 Cultural And Creative Arts Practical
Topics: Colour mixing Colour wheel Spectrophotometry Error analysis
Question 5 BECE_MODEL_QUESTIONS_VOL1 • 2025 • CULTURAL_AND_CREATIVE_ARTS • practical

You are required to carry out a colour‑mixing experiment and analyse the resulting paint sample using a spectrophotometer.

Question Parts

( a )
Outline the procedure for preparing 100 ml of orange paint by mixing red and yellow paints in a 2:1 volume ratio. Include at least two safety precautions.
( b )
The mixed paint is spread on a white card and its reflectance is measured with a spectrophotometer. The data obtained are shown in the table below. | Wavelength (nm) | 400 | 420 | 440 | 460 | 480 | 500 | 520 | 540 | 560 | 580 | 600 | 620 | 640 | 660 | 680 | |----------------|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----| | Reflectance (%)| 5 | 7 | 10 | 12 | 18 | 30 | 45 | 55 | 62 | 68 | 72 | 70 | 60 | 45 | 30 | (i) Describe the overall shape of the reflectance curve. (ii) Determine the wavelength at which the reflectance is maximum. (iii) State the colour corresponding to this wavelength using a standard colour chart.
( c )
Using the colour wheel, identify the complementary colour of the orange paint prepared and explain why this complementary colour is useful in design.
( d )
List two possible sources of error in the reflectance measurement and suggest one way to minimise each error.

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About This Question

This is Bece Model Questions Vol1 2025 Cultural And Creative Arts Question 5. It is one of the practical questions from the 2025 Bece Model Questions Vol1 Cultural And Creative Arts examination.

The question covers Colour mixing, Colour wheel, Spectrophotometry, Error analysis .

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