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What is the electromagnetic spectrum?
The electromagnetic spectrum explained in 90 seconds.
  1. What is the electromagnetic spectrum?
    02:06
    What is the electromagnetic spectrum?
  2. Obstacles to peace in Northern Ireland, 1968 -1985
    03:35
    Obstacles to peace in Northern Ireland, 1968 -1985
  3. Reasons for the developing crisis in Northern Ireland up to 1968
    02:43
    Reasons for the developing crisis in Northern Ireland up to 1968
  4. The outbreak of the Irish Civil War
    02:46
    The outbreak of the Irish Civil War
  5. Video 53_Darganfod arwynebedd paralelogram_FKJQ505J_compressed.mp4
    01:31
    Video 53_Darganfod arwynebedd paralelogram_FKJQ505J_compressed.mp4
  6. Video 54_Darganfod arwynebedd trapesiwm_FKJQ506D_compressed.mp4
    01:50
    Video 54_Darganfod arwynebedd trapesiwm_FKJQ506D_compressed.mp4
  7. Video 55_Cyfrifo hyd, arwynebedd a cyfaint_FKJQ507X_compressed.mp4
    02:04
    Video 55_Cyfrifo hyd, arwynebedd a cyfaint_FKJQ507X_compressed.mp4
  8. Video 52_Darganfod arwynebedd triongl_FKJQ504P_compressed.mp4
    01:27
    Video 52_Darganfod arwynebedd triongl_FKJQ504P_compressed.mp4
  9. Video 51_Datrys hafaliadau_FKJQ503W_compressed.mp4
    01:34
    Video 51_Datrys hafaliadau_FKJQ503W_compressed.mp4
  10. Video 50_Ffactorio cwadratig pan f'or cyfernod x2 yn 1_FKJQ502B_compressed.mp4
    02:44
    Video 50_Ffactorio cwadratig pan f'or cyfernod x2 yn 1_FKJQ502B_compressed.mp4
  11. Video 49_Y dull CAMO o ehangu cromfachau dwbl_FKJQ501H_compressed.mp4
    01:54
    Video 49_Y dull CAMO o ehangu cromfachau dwbl_FKJQ501H_compressed.mp4
  12. Video 48_Y dull grid o ehangu cromfachau dwbl_FKJQ500N_compressed.mp4
    01:42
    Video 48_Y dull grid o ehangu cromfachau dwbl_FKJQ500N_compressed.mp4
  13. Video 47_Trawsnewid o rif cyffredin i ffurf safonol_FKJQ499E_compressed.mp4
    03:27
    Video 47_Trawsnewid o rif cyffredin i ffurf safonol_FKJQ499E_compressed.mp4
  14. Video 46_Trawsnewis degolyn cylchol_FKJQ498K_compressed.mp4
    02:42
    Video 46_Trawsnewis degolyn cylchol_FKJQ498K_compressed.mp4
  15. Video 45_Onglau mewn llinellau paralel 2_FKJQ497R_compressed.mp4
    01:53
    Video 45_Onglau mewn llinellau paralel 2_FKJQ497R_compressed.mp4
  16. Video 44_Onglau mewn llinellau paralel 1_FKJQ496X_compressed.mp4
    02:09
    Video 44_Onglau mewn llinellau paralel 1_FKJQ496X_compressed.mp4
  17. Video 43_Llinellau perpendicol_FKJQ495D_compressed.mp4
    03:45
    Video 43_Llinellau perpendicol_FKJQ495D_compressed.mp4
  18. Video 42_Anhafaleddau ar linell rif_FKJQ494J_compressed.mp4
    04:07
    Video 42_Anhafaleddau ar linell rif_FKJQ494J_compressed.mp4
  19. Video 41_Graffiau llinell syth_FKJQ493P_compressed.mp4
    01:52
    Video 41_Graffiau llinell syth_FKJQ493P_compressed.mp4
  20. Video 40_Datrys hafaliadau gyda ffracsiynau 2_FKJQ492W_compressed.mp4
    03:07
    Video 40_Datrys hafaliadau gyda ffracsiynau 2_FKJQ492W_compressed.mp4
  21. Video 39_Datrys hafaliadau gyda ffracsiynau 1_FKJQ491B_compressed.mp4
    01:46
    Video 39_Datrys hafaliadau gyda ffracsiynau 1_FKJQ491B_compressed.mp4
  22. Video 38_Creu fformiwla_FKJQ490H_compressed.mp4
    03:00
    Video 38_Creu fformiwla_FKJQ490H_compressed.mp4
  23. Video 37_Llusoi yn y ffurf safonol_FKJQ489N_compressed.mp4
    02:26
    Video 37_Llusoi yn y ffurf safonol_FKJQ489N_compressed.mp4
  24. Video 36_Cyfrannedd union a chyfrannedd gwrthdro_FKJQ488T_compressed.mp4
    02:21
    Video 36_Cyfrannedd union a chyfrannedd gwrthdro_FKJQ488T_compressed.mp4
  25. Video 35_Talgrynnu i ffigurau ystyrlon_FKJQ487A_compressed.mp4
    03:13
    Video 35_Talgrynnu i ffigurau ystyrlon_FKJQ487A_compressed.mp4
  26. Video 34_Helaethu ffactor graddfa sy'n ffracsiwn positif_FKJQ486F_compressed.mp4
    02:52
    Video 34_Helaethu ffactor graddfa sy'n ffracsiwn positif_FKJQ486F_compressed.mp4
  27. Video 33_Cyfrifo arwynebedd silindr 2_FKJQ485L_compressed.mp4
    02:23
    Video 33_Cyfrifo arwynebedd silindr 2_FKJQ485L_compressed.mp4
  28. Video 32_Cyfrifo arwynebedd silindr 1_FKJQ484S_compressed.mp4
    02:12
    Video 32_Cyfrifo arwynebedd silindr 1_FKJQ484S_compressed.mp4
  29. Video 31_Cymesuredd cylchdro_FKJQ483Y_compressed.mp4
    03:01
    Video 31_Cymesuredd cylchdro_FKJQ483Y_compressed.mp4
  30. Video 30_Rheolau indecsau_FKJQ482E_compressed.mp4
    02:50
    Video 30_Rheolau indecsau_FKJQ482E_compressed.mp4
  31. Video 29_Cyfrifo'r graddiant_FKJQ481K_compressed.mp4
    01:49
    Video 29_Cyfrifo'r graddiant_FKJQ481K_compressed.mp4
  32. Video 28_Rhannu mewn cymhareb_FKJQ480R_compressed.mp4
    02:50
    Video 28_Rhannu mewn cymhareb_FKJQ480R_compressed.mp4
  33. Video 27_Graffiau anhafaleddau_FKJQ479X_compressed.mp4
    05:31
    Video 27_Graffiau anhafaleddau_FKJQ479X_compressed.mp4
  34. Video 26_Newid hafaliadau gyda ffracsiynau_FKJQ478D_compressed.mp4
    03:50
    Video 26_Newid hafaliadau gyda ffracsiynau_FKJQ478D_compressed.mp4
  35. Video 25_Indecsau negatif_FKJQ477J_compressed.mp4
    02:52
    Video 25_Indecsau negatif_FKJQ477J_compressed.mp4
  36. Video 24_Defnyddio cilyddion i rannu â ffracsiynau_FKJQ476P_compressed.mp4
    02:21
    Video 24_Defnyddio cilyddion i rannu â ffracsiynau_FKJQ476P_compressed.mp4
  37. Video 23_Arffiniau isaf ac uchaf_FKJQ475W_compressed.mp4
    03:41
    Video 23_Arffiniau isaf ac uchaf_FKJQ475W_compressed.mp4
  38. Video 22_Rhannu â rhifau degol 2_FKJQ474B_compressed.mp4
    01:50
    Video 22_Rhannu â rhifau degol 2_FKJQ474B_compressed.mp4
  39. Video 21_Rhannu â rhifau degol 1_FKJQ473H_compressed.mp4
    01:41
    Video 21_Rhannu â rhifau degol 1_FKJQ473H_compressed.mp4
  40. Video 20_Onglau mewnol ac allanol polygonau_FKJQ472N_compressed.mp4
    02:17
    Video 20_Onglau mewnol ac allanol polygonau_FKJQ472N_compressed.mp4
  41. Video 19_Interior and exterior angles of polygons_FKJQ471T_compressed.mp4
    02:19
    Video 19_Interior and exterior angles of polygons_FKJQ471T_compressed.mp4
  42. BBC Bitesize - Elizabeth I - Episode 7
    12:22
    BBC Bitesize - Elizabeth I - Episode 7
  43. BBC Bitesize - Elizabeth I - Episode 6
    11:32
    BBC Bitesize - Elizabeth I - Episode 6
  44. BBC Bitesize - Elizabeth I - Episode 3
    12:39
    BBC Bitesize - Elizabeth I - Episode 3
  45. BBC Bitesize - Elizabeth I - Episode 2
    12:39
    BBC Bitesize - Elizabeth I - Episode 2
  46. BBC Bitesize - Elizabeth I - Episode 1
    12:33
    BBC Bitesize - Elizabeth I - Episode 1
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