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22 May 2023, 20:00
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Question 1
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (02:46) correct
35%
(02:32) wrong
based on 157
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
47% (01:32) correct 53%
(01:29) wrong
based on 154
sessions
History
Date
Time
Result
Not Attempted Yet
Ultraviolet radiation (with a wavelength in the range of 290 to 400 nanometers), visible light (400 to 760 nm), and infrared radiation (760 to 3,000 nm) are the three forms of energy that the earth receives from the sun. Within the ultraviolet spectrum, the three sub-categories are UVC (200–290 nm), UVB (290–320 nm), and UVA (320–400 nm). Most UVC rays do not reach the earth because ozone and other gases in the upper atmosphere absorb them, but exposure to this type of radiation from germicidal lamps and mercury lamps may still be hazardous. Excessive exposure to visible light is also thought to be harmful, but it is not of extreme importance with respect to prevention of skin damage. Most skin damage is caused by UVA and UVB radiation.
The amount of UVA that reaches the earth is ten times greater than UVB, but the amount of UVA need to produce sunburn in human skin is 800 to 1,000 times higher than UVB. Nevertheless, UVA intensifies the sunburn effects of UVB through a delayed erythema and aids in cancer formation. Thus, effective sunscreens and sun blocks must protect throughout both the UVB and UVA ranges.
The amount of UVA that reaches the earth is ten times greater than UVB, but the amount of UVA need to produce sunburn in human skin is 800 to 1,000 times higher than UVB. Nevertheless, UVA intensifies the sunburn effects of UVB through a delayed erythema and aids in cancer formation. Thus, effective sunscreens and sun blocks must protect throughout both the UVB and UVA ranges.
1. Which of the following can be inferred from the passage?
I. A form of energy with a wavelength in the range of 2,000 to 2,500 nanometers would not be categorized as ultraviolet radiation.
II. UVB rays cannot cause cancer formation without the intensifying effects of UVA.
III. Ultraviolet radiation is not a form of infrared radiation.
A. I Only
B. III Only
C. I and III Only
D. II and III Only
E. I, II, and III
I. A form of energy with a wavelength in the range of 2,000 to 2,500 nanometers would not be categorized as ultraviolet radiation.
II. UVB rays cannot cause cancer formation without the intensifying effects of UVA.
III. Ultraviolet radiation is not a form of infrared radiation.
A. I Only
B. III Only
C. I and III Only
D. II and III Only
E. I, II, and III
2. The highlighted sentence serves which of the following roles?
I. provides a factual basis for creating sunscreens and sun blocks with certain properties.
II. undermines an argument presented earlier in the passage.
III. suggests that, within the wavelength range of ultraviolet radiation, radiation with wavelength lower than 320 nm can exacerbate the carcinogenic properties of radiation with a wavelength higher than 320 nm.
A. I Only
B. III Only
C. I and III Only
D. II and III Only
E. I, II, and III
I. provides a factual basis for creating sunscreens and sun blocks with certain properties.
II. undermines an argument presented earlier in the passage.
III. suggests that, within the wavelength range of ultraviolet radiation, radiation with wavelength lower than 320 nm can exacerbate the carcinogenic properties of radiation with a wavelength higher than 320 nm.
A. I Only
B. III Only
C. I and III Only
D. II and III Only
E. I, II, and III
RC Butler 2023 - Practice Two RC Passages Everyday.
Passage # 159 Date: 23-May-2023
This question is part of RC Butler 2023. Click here for Details
Passage # 159 Date: 23-May-2023
This question is part of RC Butler 2023. Click here for Details
Manhattan GRE 5lb.
