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Question 1

gamma rays wv, source and uses

Answer 1

1. less than 10-3 nm
2. radioactive decay of nucleus
3. strong penetrating power so used for cancer treatment and also used for food preservation

Question 2

X rays wv, source and uses

Answer 2

1. 10-3nm to 1nn
2. x ray tubes
3. medical diagnosis and study of crystal structures

Question 3

UV rays wv, source and uses

Answer 3

1.1nm to 400nm
2. inner shell electrons moving to lower energy levels
3. food preservation and finding altercation of ghee (fluorescent property)

Question 4

visible rays wv, source and uses

Answer 4

1. 400nm to 700nm
2. e emit light on changing energy levels
3. stimulates nerve ending of human eyes

Question 5

IR rays wv, source and uses

Answer 5

1. 700nm to 1mm
2. vibration of atoms/molecules
3. IR/haze photography and therapeutic purposes

Question 6

microwave rays wv, source and uses

Answer 6

1. 1mm to 0.1m
2. magnetron valve
3. radar communications

Question 7

radio rays wv, source and uses

Answer 7

1. more than 0.1 m
2. rapid acc or deacc of e in antenna
3. radio communication

Question 8

which type of rays are snake detectable

Answer 8

IR

Question 9

_ rays are also called heat waves

Answer 9

infrared