grade 11 physics light waves test

📚 Quick Study Guide

• 💡 Wave Nature of Light: Light exhibits wave-like properties such as diffraction and interference.
• 🌊 Wavelength ($\lambda$): The distance between two successive crests or troughs of a wave. Measured in meters (m).
• frequency (f): The number of waves passing a point per unit time. Measured in Hertz (Hz).
• ⏱️ Speed of Light (c): In a vacuum, $c = 3.0 \times 10^8$ m/s.
• 🔢 Wave Equation: Relates speed, frequency, and wavelength: $c = f\lambda$.
• 🌈 Refraction: The bending of light as it passes from one medium to another.
• 📐 Snell's Law: $n_1 \sin(\theta_1) = n_2 \sin(\theta_2)$, where $n$ is the refractive index and $\theta$ is the angle of incidence/refraction.
• 🔎 Interference: The superposition of two or more waves resulting in either constructive or destructive interference.
• ✨ Diffraction: The spreading of waves as they pass through an aperture or around an obstacle.

Practice Quiz

1. What phenomenon demonstrates the wave nature of light?
   1. Reflection
   2. Refraction
   3. Diffraction
2. What is the relationship between the speed of light (c), frequency (f), and wavelength ($\lambda$)?
   1. $c = f + \lambda$
   2. $c = f\lambda$
   3. $f = c\lambda$
3. What happens when light passes from air into glass?
   1. It speeds up
   2. It slows down
   3. Its speed remains constant
4. Which of the following is true about constructive interference?
   1. The waves cancel each other out
   2. The waves combine to create a larger amplitude
   3. The waves pass through each other without any effect
5. What does Snell's Law describe?
   1. The reflection of light
   2. The refraction of light
   3. The diffraction of light
6. If the wavelength of light increases, what happens to its frequency (assuming constant speed)?
   1. It increases
   2. It decreases
   3. It remains the same
7. What is the refractive index?
   1. A measure of how much a medium slows down light
   2. A measure of how much a medium speeds up light
   3. A measure of the brightness of light