lesson 4

Question 1

evacuated glass envelope which produced electrons

Answer 1

crookes tube

Question 2

discovered the element thallium

Answer 2

william crookes

Question 3

a phosphor material which converts xray energy into light photons

Answer 3

barium platinocyanide

Question 4

an evacuated glass envelope composed of an anode and cathode where xray are produced

Answer 4

xray tube

Question 5

in diagnostic xray tube

Answer 5

99% heat and 1% xray is produced

Question 6

condition necessary for xray production

Answer 6

1. source of electrons
2. acceleration of electrons
3. focusing of electrons
4. deceleration of electrons

Question 7

radiation produced when high speed of electrons are suddenly stopped or decelerated

Answer 7

bremsstrahlung radiation

Question 8

radiation produced when an outer shell electron jumps into inner shell

Answer 8

characteristics radiation

Question 9

radiation coming out from the xray tube before hitting the patient

Answer 9

primary radiation

Question 10

radiation beam exiting from tissue and hitting the xray film

Answer 10

remnant radiation

Question 11

secondary radiation emitted through the tube housing

Answer 11

leakage radiation

Question 12

radiation that during its passage through an object has been deviated in direction

Answer 12

scatter radiation

Question 13

produced by electrons impacting the anode outside the focal spot

Answer 13

off-focus radiation

Question 14

Conditions Necessary for X-ray Production:

Answer 14

1. Source of electrons
2. Acceleration of electrons
3. Focusing the electrons
4. Deceleration of electrons

Question 15

are produced when accelerated electrons
are suddenly decelerated.

Answer 15

X-ray

Question 16

when did a German physicist with the name of Wilhelm Conrad
Röentgen accidentally discovered x-ray in his laboratory at Wurzburg, Germany.

Answer 16

November 8, 1895