An fear - Is fear traidisiúnta é an fear chéile. Ba mhaith leis a bheith ina chónaí ina cheantar dúchais. Ba mhaith leis go mbeadh clann aige agus ag a bhean, agus ghlac sé leis go mbeadh na rudaí céanna ag teastáil uaithi. Cheap sé go mbeadh sé sona sásta leis an saol sin. Tá mianta an fhir dírithe ar an gclann agus ar an mbaile.

An bhean - Is bean neamhspléach, nua-aimseartha í. Bhí tuairimí difriúla aici faoin saol a bheadh aici agus í pósta. Ba mhaith léi cothromaíocht a bheith sa phósadh agus a roghanna féin a dhéanamh... (More)

Light

• Refraction is the bending of light as it goes from one medium to another.
  
• Laws of Refraction: (1) Incident ray, refracted ray & normal are on the same plane. (2) Sine I/Sine R is constant.
• Refractive Index: Sine I/Sine R = 1/Sin C = Real depth/Apparent depth = c1/c2
• Critical Angle: The angle whose angle of incidence is 90 when light goes from a denser to a rarer medium.
• Total Internal Reflection: When light travelling from a denser to a rarer medium strikes the second medium with an angle of incidence greater than the critical angle, it is reflected... (More)