8 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Wavelength and Frequency 4 questions
Wavelength and Frequency
New Regents original practice • Name: ____________________ Date: __________ Show your work for written answers.
For electromagnetic waves in vacuum, c = fλ. Use c = 3.00 × 108 m/s and 1 nm = 10-9 m.
Question 1
How does wavelength change if the frequency of an electromagnetic wave in vacuum doubles?
- It doubles.
- It is cut in half.
- It stays the same.
- It becomes four times as large.
Question 2
Convert a wavelength of 640. nm to meters. Show the conversion factor.
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Question 3
A radio signal in vacuum has a frequency of 1.50 × 10⁸ Hz. Calculate its wavelength.
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Question 4
Which property has the same value for visible light and radio waves in vacuum?
- Frequency
- Wavelength
- Wave speed
- Photon energy
Light for Optical Sensors 4 questions
Light for Optical Sensors
Use the information below to answer the questions.
An engineer compares three light sources for a sensor. The table gives wavelengths in vacuum. In this model, visible light spans approximately 400 to 700 nm.
| Source | Wavelength (nm) |
|---|---|
| A | 365 |
| B | 525 |
| C | 940 |
Question 5
Which source produces light in the stated visible range?
- A
- B
- C
- A and C
Question 6
Which source has the highest frequency? Explain using the relationship between frequency and wavelength.
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Question 7
Calculate the frequency of source B in hertz. Show your wavelength conversion and calculation.
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Question 8
Which statement correctly compares sources B and C in vacuum?
- B has a lower frequency than C.
- B and C have equal frequencies.
- B has a higher frequency than C.
- B travels faster than C.
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