Course outline
Module 1
Module 1: Introduction to Light and Colour
Introduction to Light and Colour
Module 2
Module 2: The Nature of Light
Module 3
Module 3: Wavelength and Frequency
Wavelength and Frequency
Knowledge check
Q1. What is the relationship between wavelength and frequency of light?
- A. They are directly proportional
- B. They are inversely proportional ✓
- C. They are unrelated
- D. They are equal
Why: As wavelength increases, frequency decreases, and vice versa, since their product is constant (speed of light).
Q2. Which color of light has the longest wavelength in the visible spectrum?
- A. Blue
- B. Red ✓
- C. Green
- D. Violet
Why: Red light has the longest wavelength in the visible spectrum, while violet has the shortest.
Q3. What is the unit of frequency?
- A. Meters
- B. Hertz ✓
- C. Seconds
- D. Waves
Why: Frequency is measured in Hertz (Hz), which represents the number of waves passing a point per second.
Q4. What happens to the frequency of light when its wavelength decreases?
- A. It increases ✓
- B. It decreases
- C. It remains the same
- D. It becomes zero
Why: Frequency and wavelength are inversely proportional, so a decrease in wavelength results in an increase in frequency.
Q5. Which of the following has the highest frequency?
- A. Radio waves
- B. Microwaves
- C. Visible light
- D. X-rays ✓
Why: X-rays have the highest frequency among the options, as they are part of the high-energy electromagnetic spectrum.
Module 4
Module 4: Reflection and Refraction
Reflection and Refraction
Module 5
Module 5: Colour Perception
Module 6
Module 6: Light in Different Media
Module 7
Module 7: Applications of Light and Colour
Applications of Light and Colour
Knowledge check
Q1. Which of the following is a primary source of light?
- A. Mirror
- B. Light bulb ✓
- C. Wall
- D. Shadow
Why: A light bulb emits light, making it a primary source, while the others are not sources of light.
Q2. What is the term for the bending of light as it passes from one medium to another?
- A. Reflection
- B. Refraction ✓
- C. Diffraction
- D. Absorption
Why: Refraction is the bending of light when it moves between different media.
Q3. Which colour has the longest wavelength in the visible spectrum?
- A. Blue
- B. Green
- C. Red ✓
- D. Violet
Why: Red light has the longest wavelength in the visible spectrum.
Q4. What type of mirror reflects light in a way that forms a virtual image?
- A. Plane mirror
- B. Convex mirror
- C. Concave mirror
- D. All of the above ✓
Why: All types of mirrors can form virtual images depending on the object's position.
Q5. Which of the following is an example of light being scattered?
- A. Rainbow formation ✓
- B. Light passing through a prism
- C. Light reflecting off a smooth surface
- D. Light traveling in a straight line
Why: Rainbows are formed due to the scattering and dispersion of light in water droplets.