A star like the Sun emits radiation as electromagnetic waves. (a) Part of the electromagnetic spectrum is shown in the table. radio microwaves infrared visible (i) Complete the table to show the electromagnetic waves in order of decreasing wavelength. Use the words in the list: gamma-rays ultra-violet X-ray (ii) Complete the sentence about electromagnetic waves in space. Use the words in the list. decreases increases stays the same As the wavelength of an electromagnetic wave increases, the frequency ............................... . (b) Fig. 19.1 shows how the intensity of the Sun's radiation changes with wavelength. Fig. 19.1 Use Fig. 19.1 to find the wavelength of the Sun's radiation at maximum intensity. Show your working on Fig. 19.1.

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A star like the Sun emits radiation as electromagnetic waves - OCR Gateway - GCSE Physics - Question 19 - 2023 - Paper 2

Question 19

A star like the Sun emits radiation as electromagnetic waves. (a) Part of the electromagnetic spectrum is shown in the table. radio microwaves infrared visible ... show full transcript

Worked Solution & Example Answer:A star like the Sun emits radiation as electromagnetic waves - OCR Gateway - GCSE Physics - Question 19 - 2023 - Paper 2

Step 1

Complete the table to show the electromagnetic waves in order of decreasing wavelength.

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Answer

The order of electromagnetic waves in decreasing wavelength is:

radio
microwaves
infrared
visible
ultra-violet
X-ray
gamma-rays

Step 2

Complete the sentence about electromagnetic waves in space.

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Answer

As the wavelength of an electromagnetic wave increases, the frequency decreases.

Step 3

Use Fig. 19.1 to find the wavelength of the Sun's radiation at maximum intensity.

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Answer

From Fig. 19.1, the wavelength at maximum intensity is measured to be approximately 1.0 μm.

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A star like the Sun emits radiation as electromagnetic waves - OCR Gateway - GCSE Physics - Question 19 - 2023 - Paper 2

Worked Solution & Example Answer:A star like the Sun emits radiation as electromagnetic waves - OCR Gateway - GCSE Physics - Question 19 - 2023 - Paper 2

Complete the table to show the electromagnetic waves in order of decreasing wavelength.

Complete the sentence about electromagnetic waves in space.

Use Fig. 19.1 to find the wavelength of the Sun's radiation at maximum intensity.

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