Summerise Flashcards
(26 cards)
What is the definition of wavelength?
The distance between successive crests of a wave.
True or False: Wavelength is inversely related to frequency.
True
Fill in the blank: The formula to calculate wavelength (λ) is ____ = velocity (v) / frequency (f).
λ
What is the unit of measurement for wavelength?
Meters (m)
What is the relationship between wavelength and energy for electromagnetic waves?
Longer wavelengths correspond to lower energy, while shorter wavelengths correspond to higher energy.
Multiple Choice: Which of the following has the longest wavelength? A) Radio waves B) X-rays C) Ultraviolet light D) Gamma rays
A) Radio waves
What happens to a wave when it reflects off a barrier?
It changes direction but retains its speed and frequency.
True or False: The angle of incidence equals the angle of reflection.
True
What type of wave is primarily affected by reflection?
Mechanical waves, such as sound and water waves.
Fill in the blank: Reflection occurs when a wave encounters a _____.
barrier
Short Answer: Name one real-world example of wave reflection.
Echoes from sound waves.
Multiple Choice: In which medium does light travel fastest? A) Water B) Air C) Glass D) Vacuum
D) Vacuum
What is the principle of superposition in relation to waves?
When two or more waves overlap, the resultant wave is the sum of the individual waves.
True or False: Waves can reflect and refract at the same time.
True
Fill in the blank: When a wave reflects, its speed remains the same, but its _____ may change.
direction
What is constructive interference in wave reflection?
When two waves combine to create a wave with a larger amplitude.
What is destructive interference in wave reflection?
When two waves combine to reduce or cancel each other’s amplitude.
Multiple Choice: Which of the following describes a wave that travels in a straight line until it hits a barrier? A) Diffraction B) Reflection C) Transmission D) Refraction
B) Reflection
How does the wavelength of sound waves change when they reflect off a surface?
The wavelength remains the same; only the direction changes.
Fill in the blank: The frequency of a wave is defined as the number of waves that pass a given point in a _____.
unit of time
Short Answer: What effect does a rough surface have on wave reflection?
It causes diffuse reflection, scattering the waves in many directions.
Multiple Choice: Which phenomenon occurs when waves bend around obstacles? A) Reflection B) Refraction C) Diffraction D) Absorption
C) Diffraction
True or False: All electromagnetic waves travel at the same speed in a vacuum.
True
What is the effect of temperature on the speed of sound waves in air?
Sound travels faster in warmer air compared to cooler air.
