Question 1: Define what is meant by the term 'absorbing and reflecting light' in the context of colored objects.

Answer: Absorbing and reflecting light refers to how objects absorb certain wavelengths of light and reflect others, which determines the color we see.

Question 2: Explain why a red apple appears red to our eyes.

Answer: The red apple appears red because it absorbs most wavelengths of light except for red, which it reflects to our eyes.

Question 1: A blue shirt reflects light with a wavelength of approximately 470 nm. Convert this wavelength to meters.

Answer: 4.70 x 10^-7 meters

Question 2: If a yellow object reflects light at a wavelength of 580 nm, what is this wavelength in nanometers? Show your calculation.

Answer: 580 nm (no conversion needed as it is already in nanometers)

Question 1: Describe a simple experiment to test how fabric dyes absorb different wavelengths of light. Include the variables involved and safety precautions.

Answer: An experiment could involve shining different colored lights on fabric samples dyed with various colors. Variables include light wavelength, fabric dye color, and fabric type. Safety precautions include handling light sources carefully to avoid eye damage and using gloves when handling dyes.

Question 1: A car's paint reflects mainly green light at around 530 nm. If the car appears green to viewers, what does this indicate about the paint's absorption and reflection properties?

Answer: It indicates that the paint absorbs most wavelengths except green, which it reflects to produce the green appearance.

Question 1: Explain how understanding the absorption and reflection of light by pigments is important in the manufacturing of colored plastics. (4 marks)

Answer: Manufacturers select pigments based on their ability to absorb certain wavelengths and reflect others. This ensures the plastic appears the desired color. Proper understanding helps in creating durable, vibrant products that maintain their color over time.

Question 2: A consumer product appears black in daylight but glows red under UV light. What does this suggest about the materials used? (3 marks)

Answer: It suggests that the product contains fluorescent or phosphorescent materials that absorb UV light and emit red light, giving it a glowing appearance under UV.