Flashcards
Chapter 1 - Imaging Flash Cards
Cards in this deck (16)
- 1How are images formed with Converging Lenses?1. Images are formed through the refraction of waves
2. There is a drop in speed when light travels through another medium
3. Light travlling in the middle is slower than the light on the outside
4. Some of the light gets to the focal point quicker
5. Curvature is added to the waves depending on where light intersects the lens
6. Spherical curvature is given to the waves aimed at the focus - 2What is the formula for the power of Lens?Power = 1/ Focal Length
or
P=1/f - 3State the Lens formula
- 4State the effect of a converging lens on 1) A very distant object 2) Object nearby but beyond the focus 3) Object at the focus
- 5What is the formula for Magnification?
- 6What is the conversion between a bit and a byte?1 byte = 8 bits
- 7How can the number of alternatives that a string can represent calculated?
- 8What is meant by the resolution of an image?The resolution of an image is scale of the smallest detail that can be represented.
- 9What is the formula for the amount of information in an image?Amount of information in image = bits per pixel x no. of pixels
- 10What do you do to change the brightness of an image?Add a fixed positive value to each pixel
- 11How do you change the contrast of an image?Multiply the pixels by a fixed value
- 12How can you get rid of Noise on an image?Using Mean smoothing or median smoothing
- 13Light is an electromagnetic wave. This implies 2 things. State them.1. All electromagnetic waves are transverse
2. All electromagnetic waves can be polarised - 14Transverse Waves are polarised when they are...?...oscillating in one plane only.
- 15Electromagnetic waves are made up of two waves. Name them and the direction in which they oscillate.1. Electric Field (oscillates in vertical plane)
2. Magnetic Field (oscillates in horizontal plane) - 16What key words must be used when describing polarisation?1. Intensity
2. Horizontal and Vertical Components
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- A-Level Physics Flashcards on Chapter 1 - Imaging Flash Cards, created by Kavinda J.D on 04/09/2016.
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- Kavinda J.D
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