Wave Properties and Light Reflection

The video introduces the wave nature of light, starting with a review of periodic waves and wave fronts from grade 11. It covers geometric and time-based wave characteristics, including amplitude, wavelength, phase, period, frequency, and wave speed. The video concludes with an introduction to reflections, explaining the ray approximation and the law of reflection.

What is the primary focus of the new unit introduced in the video?

• The gravitational effects of light

• The particle nature of light

• The wave nature of light

• The chemical properties of light

Which term describes the maximum displacement from equilibrium in a wave?

• Frequency

• Wavelength

• Amplitude

• Phase

What is the distance between two similar points in consecutive cycles of a wave called?

• Amplitude

• Wavelength

• Frequency

• Phase

How is the period of a wave defined?

• The time for a particle to complete one cycle

• The time it takes for a wave to travel a certain distance

• The number of cycles per second

• The distance between two crests

What is the relationship between frequency and period?

• Frequency is the inverse of the period

• Frequency is half of the period

• Frequency is the square of the period

• Frequency is double the period

What is the Ray approximation in the context of light?

• Light travels in circular paths

• Light travels in zigzag patterns

• Light travels in straight parallel lines

• Light travels in curved paths

What happens when light hits an obstacle and reflects?

• It bounces back on the same side

• It gets absorbed by the obstacle

• It passes through the obstacle

• It bends around the obstacle

What is the angle between the incoming ray and the normal called?

• Angle of reflection

• Angle of refraction

• Angle of deviation

• Angle of incidence

According to the law of reflection, how do the angle of incidence and angle of reflection compare?

• The angle of incidence is greater

• The angle of reflection is greater

• They are equal

• They are unrelated

What is the normal in the context of reflection?

• A line parallel to the surface

• A line perpendicular to the surface

• A line at a 45-degree angle to the surface

• A line that bisects the angle of incidence