Black-Body Radiation During a hot ...
A True No worries! We‘ve got your back. Try BYJU‘S free classes today! B False Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
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Solution The correct option is B False During a hot day, we should wear light coloured clothes as they reflect most of the sunlight falling on them whereas dark coloured clothes absorb most of the lights falling on them.
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As an expert in physics and educational content, I bring a wealth of knowledge and experience to discuss the concepts presented in the article related to Byju's Answer for Standard VII Physics on Black-Body Radiation.
Black-Body Radiation is a fundamental concept in physics that deals with the electromagnetic radiation emitted by a perfect absorber and emitter of radiation, often referred to as a black body. A black body is an idealized object that absorbs all incident electromagnetic radiation, regardless of frequency or angle.
Now, let's break down the various concepts mentioned in the article:
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Black-Body Radiation:
- Black-Body Radiation is the electromagnetic radiation emitted by a perfect black body.
- A black body is an object that absorbs all incident radiation and emits radiation at all frequencies.
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Wearing Light Colored Clothes in Hot Weather:
- The article mentions that on hot days, it is advised to wear light-colored clothes.
- This is because light-colored clothes reflect most of the sunlight falling on them.
- Dark-colored clothes, on the other hand, absorb most of the sunlight, making them less suitable for hot weather.
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Painting Outer Walls of Houses White in Hot Climate:
- The article poses a question about painting the outer walls of houses with white paint in hot climates.
- The recommended practice is likely based on the same principle—white surfaces reflect more sunlight, helping to keep the building cooler.
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Clothing Choice in Different Seasons:
- The article touches upon the choice of clothing during different seasons.
- In winter, people often wear woolen and dark-colored clothes to stay warm. This is because dark colors absorb and retain more heat.
- In summer, wearing light-colored clothes is recommended for comfort as they reflect sunlight and do not absorb as much heat.
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BNAT Exam for BYJU'S Scholarship:
- The article briefly mentions the BNAT exam as a means to get a 100% scholarship for BYJU'S courses.
- BNAT likely stands for BYJU'S National Aptitude Test.
In summary, the article discusses the principles of Black-Body Radiation, the effects of different colored surfaces on heat absorption and reflection, the choice of clothing based on weather conditions, and a scholarship exam (BNAT) offered by BYJU'S. These concepts align with fundamental physics principles and practical applications in daily life.