Ultraviolet radiation (with a wavelength in the range of 290 to 400 na

Question

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 
 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

2 
 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

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

Manhattan GRE 5lb.

Anishka01 · Answer

WHERE CAN WE FIND THE EXPLANATION?

Sai.exe · Answer

Can you justify 1 questions answer

Posted from my mobile device

Sajjad1994 · Answer

Official Explanation

1. Which of the following can be inferred from the passage?

Explanation

The passage states that ultraviolet radiation is in the range of 290–400 nm, so energy with a wavelength of 2,000–2,500 nm would not fall in that range (in fact, it would fall into the range of infrared radiation). The passage additionally states that UVA rays intensify UVB damage and can aid in cancer formation, but it cannot be inferred that UVA rays are necessary for cancer to form. Finally, since ultraviolet radiation has a wavelength in the range of 290–400 nanometers and infrared radiation is in the range of 760–3,000 nm, ultraviolet radiation is not a form of infrared radiation.

Answer: C

Ahdiajdbds · Answer

Official explanation of questions 2 plz

Posted from my mobile device

Sajjad1994 · Answer

Official Explanation

2. The highlighted sentence serves which of the following roles?

Explanation

That UVA rays can intensify sunburn and aid in cancer formation  “provides a factual basis”  for the recommendation in the next sentence that sunscreens block both UVB and UVA rays.

The highlighted sentence does not  “undermine an argument” —in fact, no  “argument”  exists in the passage, which is informative and factual.

Finally, the third statement is the opposite of what is given: UVA (above 320 nm)  “exacerbates the carcinogenic properties”  of UVB (below 320 nm), not the other way around.

Answer: A

GMATking94 · Answer

Since III is not possible and it exactly the opposite of what is stated in the passage. This makes the Q easy to solve. All options have III in them apart from A.

Hence A is Ans.

Ultraviolet radiation (with a wavelength in the range of 290 to 400 na

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Reading Comprehension (RC) Questions

Ultraviolet radiation (with a wavelength in the range of 290 to 400 na

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards