Term 2 Light and sound Flashcards
(16 cards)
What is the role of waves in energy transfer?
Energy is transferred using waves.
What is the difference between transverse and longitudinal waves?
Transverse waves oscillate perpendicular to the direction of energy transfer, while longitudinal waves oscillate parallel to the direction of energy transfer.
What are the key terms used to label a longitudinal wave?
Compression, rarefaction, and the direction of wave transfer.
What are the key terms used to label a transverse wave diagram?
Wavelength, amplitude, frequency, crest, trough, and direction of energy transfer.
Define wave motion terms: amplitude, wavelength, frequency, period, Hertz, crest, trough, and direction of energy transfer.
Amplitude is the height of the wave, wavelength is the distance between successive crests, frequency is the number of waves passing a point per second, period is the time for one complete wave cycle, Hertz is the unit of frequency, crest is the highest point of the wave, trough is the lowest point, and direction of energy transfer indicates the wave’s travel direction.
What is the formula for wave calculations?
v = λ x f
What are the different parts of the electromagnetic spectrum?
The electromagnetic spectrum includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
How does wavelength relate to the type of EM radiation?
Wavelength changes from long (radio waves) to short (gamma rays) across the electromagnetic spectrum.
How is light defined in terms of wave type?
Light is defined as a transverse wave.
What are examples and uses of each type of EM radiation?
Radio waves (communication), microwaves (cooking), infrared (thermal imaging), visible light (sight), ultraviolet (sterilization), X-rays (medical imaging), and gamma rays (cancer treatment).
Define transparent, translucent, opaque, and luminous.
Transparent materials allow light to pass through clearly, translucent materials allow some light to pass but scatter it, opaque materials do not allow light to pass, and luminous objects emit their own light.
How are objects observed in a plane mirror?
Objects are observed in a plane mirror as virtual images that appear behind the mirror at the same distance as the object in front.
What is the difference between regular and diffuse reflection?
Regular reflection occurs on smooth surfaces, producing clear images, while diffuse reflection occurs on rough surfaces, scattering light and producing unclear images.
What is the relationship between the angle of incidence, normal, and angle of reflection?
The angle of incidence is equal to the angle of reflection, both measured from the normal.
How do you calculate the angle of reflection from the angle of incidence in a plane mirror?
Using the Law of Reflection: i = r, where i is the angle of incidence and r is the angle of reflection.
What is required to draw ray diagrams for reflection in a plane mirror?
Ray diagrams should include incident rays, reflected rays, the normal line, and angles of incidence and reflection.
