a) Describe the general effects of ionising radiation on cells. b) Contrast the effects on cells of alpha radiation, beta radiation and gamma radiation. [Suggested word count 260] [3.1]
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- Which of the radiation most danger? Alpha or gamma or beta and whyThree polarizing sheets are placed in a stack with the polarizing directions of the first and third perpendicular to each other. What angle should the polarizing direction of the middle sheet make with the polarizing direction of the first sheet to obtain maximum transmitted intensity when unpolarized light is incident on the stack? 0° 15° 30° 45° 60° 75° 90°There are an alpha, beta and gamma particles that you all need to use only once. One of them can be thrown away, one of them needs to be hidden in your pocket, and you need to hold the last one. In order to stay safe from radioactivity, where should you place them? Throw away: ____ In your pocket:____ In your hand:_____ Options: Beta, Alpha, Gamma. Please explain fully. Thank you!
- You suspect that a patient’s arm is broken. What type of radiation might help you find out?QUESTION 38 Rank the following procedures from lowest effective radiation dose to highest. The first choice should have little to no radiation and the last choice should have the highest radiaiton exposure. MRI of the brain extremity x-ray (ex. hand) full spine x-ray (cervical, thoracic, AND lumbar series) PET/CT fusion of the abdomen and pelvisThe table gives the data the scientist obtained when she tested 1 kg of cooked A scientist has compared the vitamin content of food exposed to gamma radiation (c) with food that has not been exposed. chicken. Food not exposed to gamma radiation Food exposed to gamma radiation Vitamin Mass in milligrams Mass in milligrams B6 1.22 1.35 B12 21.00 28.00 E 3.30 2.15 Niacin 58.00 55.50 Riboflavin 2.10 2.25 Considering only this data, which one of the following is a correct conclusion? Put a tick (v) in the box next to your answer. Vitamin content is not affected by gamma radiation. Gamma radiation completely destroys some types of vitamin. Exposure increased the content of some types of vitamin. (1) (Total 6 marks)
- The linear absorption coefficient for 5-MeV gamma rays in lead is 78 m-1. Find the thickness of lead required to reduce by one- fourth the intensity of beam of such gamma rays. O A. 8.9 mm O B. 17.8 mm OC. 3.7 mm OD. 1.9 mm O E. 7.4 mmWhich row correctly identifies the three forms of radiation in the image above? GAMMA ALPHA BETA 2 1 3 2 3 1 3 1 2 1 2 3What is the proper minimum required radiation protection for gamma radiation?