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physics
unit1 waves and radiation
Question | Answer |
---|---|
what is the multiplier for milli | x10¬3 |
what do all waves transfer | energy |
whats faster light or sound | light |
what is frequency | frequency is the number of complete waves in 1 second |
what are the 2 types of waves | longitudinal and transverse |
name a transverse wave | water ,radio ,x rays |
name a detector for radiation | Geiger muller tube |
what is the speed of the electro magnetic spectrum | 3x108 |
what has the longest wavelength- radio infared gamma | radio |
what is activity | activity is the number of nuclie which decay in 1 secound |
what is the unit of activity | Bq |
what is absorbed dose | absorbed dose is the amount of radiation absorbed per 1kg of a material |
what is the unit of absorbed dose | Gy |
name 3 precautions taken when handling radiation | maintain a safe distance use tongs limit time exposed |
name one use of radiation in medicine | radiotherapy |
what is equivalent dose | equivalent dose is the risk of biological harm in the tissue |
what is the unit of equivalent dose | sv |
what is half life | half life is the time taken for radio active source to half |
what is the unit of half life | Bq |
what is fission | fission is when a nucleus of an atom is split into 2 nuclei's |
what is fusion | fusion is a chain reaction is when 2 nuclei's join together |
what is refraction | refraction is when a wave or light ray moves from one medium to another changing speed and direction |
what's more dense air or glass | glass |
what are the colours in the visible spectrum | red orange yellow green blue indigo violet |
name a detector for microwaves' | areal |
name a detector for ultraviolet | florescent paint |
name a detector for infrared | blackened thermometer |