Penetrating Ability of EM Radiation (Grade 10 NSC Matric Physical Sciences): Flashcards
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Relationship between EM frequency and penetrating ability
Relationship between EM frequency and penetrating ability
Higher frequency = higher energy = greater penetrating ability
Ionising radiation types
Ionising radiation types
UV radiation, X-rays, and gamma rays
UVA radiation effects
UVA radiation effects
Penetrates deeply, skin ageing, DNA damage, no sunburn
UVB radiation main danger
UVB radiation main danger
Causes skin cancer by exciting DNA molecules in skin cells
Melanin function
Melanin function
Brown pigment that blocks UV penetration, protects deeper tissue
SPF (Sun Protection Factor) protects against
SPF (Sun Protection Factor) protects against
UVB radiation
X-ray penetrating ability
X-ray penetrating ability
Pass through skin and soft tissue to image bones
Gamma-ray penetrating ability vs other EM radiation
Gamma-ray penetrating ability vs other EM radiation
Highest energy and greatest penetrating ability of all EM types
Most significant biological damage from gamma-rays
Most significant biological damage from gamma-rays
DNA double-strand breaks
Mobile phone safety recommendations
Mobile phone safety recommendations
Use hands-free devices, keep phone away from body