1590608
Description
Flashcards by Zara Kanani, updated more than 1 year ago
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Created by Zara Kanani
about 10 years ago
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| Question | Answer |
| What is the order of the electromagnetic spectrum from high frequency and low wavelength to low frequency to high wavelength? | *Gamma *X-ray *Ultraviolet *Visible light *Infra red *Microwave *Radiowave |
| What is the mnemonic used to remember the electromagnetic spectrum? | *Granny's *X-box *Uses *Volts *In *My *Room |
| What is a longitudinal wave? | A wave which the direction of the vibrations of the particles are the para..llel to the direction of which the waves travel. |
| What is a transverse wave? | Waves in which the directions of the vibration is perpendicular to the direction of which the wave is traveling. |
| What is the wavelength the distance between? |
*It is the distance from one wave peak to another.
Image:
physics (image/jpg)
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| What is the frequency of a wave and what is it measured in? | The number of complete waves passing a fixed point per second. |
| What does a wave look like if it's compressed? | The wave will be in straight lines close together. |
| What does a wave look like if it has a rarefaction? | The waves will be more spread apart. |
| What is a radiowave used for? | *Communication |
| What is a microwave used for? | *Satellite communication and cooking |
| What is Infra-red used for? | *Remote controls *Thermal cameras |
| What is Visible light used as? | *Seeing *Optical fiber communication |
| What is ultraviolet light used for? | *Florescent tubes *Security markings. |
| What is an X-ray used for? | *Creating images of the inside of the body. |
| What are gamma rays used for? | *Sterilizing medical equipment *Treating tumors |
| All the members of the E-M spectrum are what type of waves? | *Transverse waves |
| What is the law of refraction? | The angle of incidence=the same as the angle of reflection |
| When a light ray travels from air to glass which way does it reflect? | Away from the normal. |
| When light travels from glass into the air what happens? | It refracts towards the normal. |
| Name some properties of waves that make it useful for satellite communication? | They can pass through the atmosphere. |
| The higher the ...... the further the waves travel? | Frequency |
| What can visible light and microwaves both do? | *Be reflected *Travel through a vacuum at the same speed. |
| What do high frequency waves look like? | Tall and have a high pitch. |
| The bell in a jar experiment shows what? | That sound vibrations cannot travel through a vacuum |
| What are reflected images? | *Virtual *Upright *Laterally inverted |
| m/s = hertz (HZ) x meters? | Wave speed = Frequency x Waveleghth |
| Definition refraction? | The change in direction of a wave when it moves from one substance to another e.g from air to glass. |
| When light moves from a less dense substance to a more dense substance what happens? | The light speeds up. |
| Definition diffraction? | This is the spreading out of waves, and how they pass through a gap. |
| What happens when something diffracts through a wide gap? | The wave stays the same still fairly spread out |
| What happens with diffraction through a narrow gap? (Think of wide pipes and thin ones) | There's more diffraction because it will start with smaller waves and then the wave will spread out more again. Like a radiowave |
| What happens with diffraction around an obstacle? | Th wave splits in half and reduces in size and it will meet up again after passing through the object. |
| Why are the Tv and radio transitions different? | The Tv is diffracted less, where as the radio is longer and diffracted more. |
| What do waves transfer from place to place? | Energy! |
| What is the equation for speed? | Speed=distance x time |
| You always need to convert to Hertz! | 20KHz is the same as 2000Hz MHz-Hz you add 6 zeros' KHz-Hz you add two zeros |
| The colors of the rainbow! | Richard Of York Gave Battle In Vain. |
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