uvr

Question 1

(315) 320–400 nm

Answer 1

UVA

Question 2

(280) 290–320 nm

Answer 2

UVB

Question 3

(200) <100–290 nm

Answer 3

UVC

Question 4

Long-wave UV;
Near UV
for Blacklight

Answer 4

UVA

Question 5

Middle-wave
UV
Skin erythema; sunburn

Answer 5

UVB

Question 6

Short-wave UV; Far UV
Germicidal; bactericidal

Answer 6

UVC

Question 7

ULTRAVIOLET RADIATION Frequency

Answer 7

1.65 x 10^15
to 7.5 x 10^14 Hz

Question 8

Method of energy transmission

Answer 8

Radiation (Phototherapy)

Question 8

Creates ? effect on tissues

Answer 8

photochemical

Question 8

Absorbed within the first __ of human skin (epidermal layer)

Answer 8

1-2 mm (0.22mm)

Question 9

Apply perpendicularly for optimal absorption

Answer 9

Lambert’s Cosine Law / Right Angle Law

Question 10

Distance significantly alters the intensity of treatment

Answer 10

Inverse Square Law

Question 11

Checking of factors that allow optimal absorption of the
radiation inside the body

Answer 11

Law of Grotthuss Draper / Principle of Chemical Activation

Question 12

The optimal amount of energy absorption per unit of time
should be achieved in order for us to get the beneficial results
of the treatment

Answer 12

Arndt-Schultz Principles

Question 13

Taking into consideration the intensity and duration of the
treatment (inverse relationship)

Answer 13

Bunsen Roscoe Law of Reciprocity

Question 14

Least harmful d/t short wavelengths and because it can
be easily reflected back when you are not satisfying the
different laws of radiation

Answer 14

UVC

Question 15

Longest wavelength and most intense heating effects

Answer 15

UVA

Question 16

There is only a sensation of heat d/t

Answer 16

the conversion of UVR; method of energy transmission via radiation

Question 17

Excessive natural UVR exposure →

Answer 17

→ DNA damage

Question 18

Excessive natural UVR exposure

Answer 18

1. Cutaneous malignant melanoma
2. Basal-cell carcinoma
3. Squamous-cell carcinoma

Question 19

Directly proportional to the depth of penetration

Answer 19

Intensity
Wavelength
Power of Radiation Source
Exposure Duration

Question 20

Deepest wavelength

Answer 20

UVA = deepest

Question 21

Inversely proportional to the depth of penetration

Answer 21

Distance of radiation source
Frequency
Size of area
Thickness of skin
Pigmentation of skin

Question 22

Small
Emit radiation at constant intensity
Used for smaller areas
Hot Quartz
Cold Quartz

Answer 22

MERCURY ARC LAMPS

Question 23

Long Emit higher-intensity radiation Used for larger areas Low-pressure mercury discharge tubes with phosphor coating inside (Theraktin)

Answer 23

FLUORESCENT LAMPS

Question 24

Burner (argon gas and mercury) ↑ pressure & temperature (+) erythema and pigmentation Applied ≥15” from the area No need for warm-up

Answer 24

HOT QUARTZ

Question 25

Quartz tube with mercury (ionized vapor) ↓ pressure & temperature Minimal erythema and (-) pigmentation Application at close proximity Needs 5 min warm-up

Answer 25

COLD QUARTZ