Astar tonnan tarsainn – duilgheadasan agus fuasglaidhean
1.
Ma tha an ùine a dh’fheumar airson siubhal bho A gu B 2 dhiog, obraich a-mach astar an tonn thar-tharraingeach.
Aithnichte:
Cùrsaichean air astar AB = 6 meataireans
Uair ceada AB = 2 seconds
Ag iarraidh: Astar tonn thar-tharraingeach
fuasgladh:
1 wavelength tha 1 mullach agus 1 troigh ann. Tha 4 tonn-fhaid eadar A agus B. Tha an t-astar eadar A agus B 6 meatairean agus mar sin tha sin 1 tonn-fhaid. (λ) = 6 meatairs / 4 = 1.5 meataireans.
An tan ùine a dh’fheumar airson siubhal bho A gu B 2 diogan gus am bi an ùine a dh’ fheumar gus siubhal 1 tonn-fhaid = ùine (T) = 2 dioganconds / 4 = 0.5 seconds.
Co-aontar astar nan tonn:
v = λ f = λ / T
v = astar tonn, λ = wavelength, f = tricead, T = pcrìonadh
Astar na tonn:
v = 1.5 meataireans / 0.5 diogancumhaichean
v = 3 meataireans/sestaid
2. Ma tha an ùine a dh’ fheumar airson siubhal bho A gu B 8 diogan, obraich a-mach astar na tonn transverse.
Aithnichte:
Tha dà thonnan-fhaid ann.
1 wavelength (λ) = 2 x 4 meataireans = 8 mheatairs
Tréimhse (T) = 8 diogancumhaichean / 2 tonnan = 4 seconds / wavelength
A dhìth: Astar na tonn (v)
fuasgladh:
Tha astar tonn air a thomhas le bhith a’ cleachdadh co-aontar astar tonn:
v = f λ = λ/T
v = 8 meataireans / 4 diogancumhaichean
v = 2 meataireans/sestaid
