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6 Radiation is used in many different ways - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1
Question 6
6 Radiation is used in many different ways. (a) Which of these can be used both for communication and for cooking? Put a cross in the box (X) next to your answer. ... show full transcript
Worked Solution & Example Answer:6 Radiation is used in many different ways - Edexcel - GCSE Physics - Question 6 - 2018 - Paper 1
Step 1
Step 2
Use this diagram to classify the three types of radiation given in the word box.
Answer
In the Venn diagram:
- Place 'microwaves' in the overlapping section of both 'ionising radiation' and 'electromagnetic radiation' as it is a form of electromagnetic radiation that is non-ionising.
- Place 'X-rays' in the 'ionising radiation' section, as they are indeed ionising electromagnetic radiation.
- Place 'beta radiation' in the 'ionising radiation' section, as it fits this category.
Step 3
Explain the limitations of ground-based telescopes in observing stars.
Answer
Ground-based telescopes face limitations such as:
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Atmospheric Disturbance: Light from stars can be scattered or absorbed by atmospheric particles, leading to distorted images.
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Light Pollution: Artificial light from urban areas can overwhelm the faint light from stars, reducing visibility.
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Weather Conditions: Cloud cover and atmospheric conditions can restrict observation opportunities, making it difficult to gather consistent data.
Step 4
Explain how their two experiments led to these discoveries.
Answer
Herschel's experiment involved passing sunlight through a prism to analyze its spectrum. He noted a temperature increase just beyond the red part of the spectrum, indicating the presence of infrared rays, which were previously unknown.
Similarly, Ritter's experiment used sensitive silver chloride paper and also a prism to investigate light beyond the violet end of the spectrum, observing blackening of the paper, which indicated ultraviolet radiation. Both scientists’ methods showcased that light extends beyond visible wavelengths.