GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
In thermodynamics, an idealized blackbody is an object that reflects z
[#permalink]
20 Feb 2025, 08:46
20 Feb 2025, 08:46
Expert Reply
1
Bookmarks
Question 1
00:00
Question Stats:
0% (00:00) correct
0% (00:00) wrong based on 0 sessions
Hide Show timer Statistics
Question 2
00:00
Question Stats:
60% (02:11) correct
40% (02:44) wrong based on 5 sessions
Hide Show timer Statistics
B
C
In thermodynamics, an idealized blackbody is an object that reflects zero incident electromagnetic radiation, absorbing all such radiation instead and consequently warming up. The blackbody emits just as much energy per unit time as it absorbs; the electromagnetic spectrum of the emitted energy, however, is completely determined by the temperature of the blackbody and by no other properties thereof, such as material composition or structure. In contrast, reflected radiation undergoes no fundamental change in its original spectral characteristics, other than a possible Doppler shift created by the motion of the reflector relative to an observer. Researchers have recently discovered that a microscopic "forest" of vertically aligned single-wall carbon nanotubes of varying heights applied to a surface has extremely low reflectance across a wide range of wavelengths of visible light, the closest scientists have come thus far to creating a perfectly dark material.
Which sentence in the passage states the variables that define the electromagnetic spectrum of a blackbody?
Show: :: "[b
The blackbody emits just as much energy per unit time as it absorbs; the electromagnetic spectrum of the emitted energy, however ..."
Consider each of the answer choices separately and indicate all that apply.
Which of the following can be properly inferred from the passage?
A. An object that reflects incident electromagnetic radiation is not an idealized blackbody.
B. Reflected radiation always exactly matches the spectral characteristics of the original incident radiation.
C. A microscopic "forest" of vertically aligned single-wall carbon nanotubes of varying heights applied to a surface will absorb all incident electromagnetic radiation.
- Part of the project: GRE Quant & Verbal ADVANCED Daily Challenge 2025 NEW Edition - Gain 20 Kudos & Get FREE Access to GRE Prep Club TESTS
- Also replying to the unanswered questions
