Waves Flashcards
What are the basic units of measurement for waves?
Metre (m), seconds (s), hertz (Hz)
These units are used to measure wavelength, frequency, and time period of waves.
What are the key properties of waves that students should know?
Amplitude, wavefront, frequency, wavelength, period
These properties are essential for understanding wave behavior.
What is the relationship between wave speed, frequency, and wavelength?
Wave speed = frequency x wavelength
This formula is used to calculate the speed of a wave based on its frequency and wavelength.
True or False: Waves transfer energy and information without transferring matter.
True
This characteristic is fundamental to wave dynamics.
Fill in the blank: The frequency range for human hearing is _____ to _____ hertz.
20 to 20,000 Hz
This range defines the audible spectrum for humans.
What are the detrimental effects of excessive exposure to microwaves?
Internal heating of body tissue
This effect can lead to serious health issues.
What is the meaning of critical angle in optics?
The angle of incidence above which total internal reflection occurs
This concept is crucial for understanding fiber optics.
What type of waves are sound waves?
Longitudinal waves
Sound waves compress and rarefy the medium they travel through.
How does the pitch of a sound relate to its frequency?
The pitch is directly proportional to the frequency of vibration of the source
Higher frequencies correspond to higher pitches.
What is the law of reflection?
The angle of incidence equals the angle of reflection
This law governs how light reflects off surfaces.
List some uses of electromagnetic radiation.
- X-rays: observing internal structures
- Microwaves: heating food
- Infrared: thermal imaging
- Ultraviolet: sterilization
- Gamma rays: cancer treatment
Each type of radiation has specific applications in various fields.
What happens to the wavelength of electromagnetic waves as frequency increases?
Wavelength decreases
This inverse relationship is a fundamental property of waves.
What is the role of total internal reflection in transmitting information?
It allows light to be transmitted through optical fibers
This principle is essential for telecommunications.
What does amplitude relate to in sound waves?
The loudness of the sound
Greater amplitude results in louder sounds.
Fill in the blank: Light waves are _____ waves.
Transverse
This means that the oscillations are perpendicular to the direction of wave travel.
