30 Questions
How does the frequency of waves change when the wavelength appears to decrease due to the Doppler Effect?
Frequency appears to increase
What happens to the wavelength of waves emitted by a moving object as perceived by an observer in front of the object?
The wavelength appears smaller
Why do waves behind a moving vehicle appear to stretch out?
Due to increased wavelength
What is the main cause of the Doppler Effect on waves?
Changes in wave speed
What happens to the frequency of waves emitted by a moving object as perceived by observers due to the Doppler Effect?
Frequency changes based on observer position
How does an observer perceive the frequency of waves when the wavelength appears to be stretched behind a moving object?
Frequency appears to decrease
Which type of waves transfer energy from the source to an absorber?
Transverse waves
What is a common property of all electromagnetic waves?
They can travel through a vacuum
How many types of electromagnetic waves form a continuous spectrum?
7
In which part of the spectrum is visible light located?
Highest frequency region
Which type of radiation is highly ionizing and can cause harm to cells and tissues?
Ultraviolet (UV) radiation
What happens to the energy of electromagnetic radiation as its frequency increases?
Increases
What part of the electromagnetic spectrum is responsible for giving you a sun tan?
Ultraviolet
Which type of light travels down fibre optic cables more efficiently than visible light?
Infrared
What invisible signals do remote controls send to devices like TVs?
Infrared signals
What part of the electromagnetic spectrum do security cameras utilize to see in the dark?
Infrared
What process is responsible for making certain substances glow when exposed to ultraviolet light?
Fluorescence
What kind of light is the only part of the electromagnetic spectrum that the human eye can see?
Visible light
What percentage of the whole electromagnetic spectrum does visible light take up?
0.0035%
Which of the following animals can perceive beyond visible light?
Birds
What is the relationship between wavelength and frequency in the visible light spectrum?
Inversely proportional
Which color of light has the highest frequency and energy?
Violet
How do wavelength and frequency change as you move from red to violet in the visible light spectrum?
Wavelength decreases, frequency increases
Which part of the electromagnetic spectrum is detectable by the human eye?
Visible light
What part of the body absorbs x-rays the most?
Bones
Which type of electromagnetic wave can be used to effectively kill cancerous tissue?
Gamma Rays
What happens to the danger associated with electromagnetic waves as their frequency increases?
Increases
Which part of the electromagnetic spectrum has the most ionising radiation?
Gamma Rays
Why are gamma rays considered very dangerous?
They can kill cells and living tissue
Which electromagnetic waves are known for their ability to sterilize objects by killing bacteria?
Gamma Rays
Test your knowledge on the Doppler effect and how the wavelength of waves can change when an object emitting waves is in motion. Explore how the perception of wavelength differs for observers in front of and behind a moving object.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
