# MCAT PHYSICS 3

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1. formula for magnification
m=-i/o
2. what type of image does a diverging (convex) mirror/lens create
virtual upright image
3. what type of image does a concave mirr/ lensor create if object is placed beyond focal point, if object is place inside focal point?
beyond- real inverted image

inside- virtual upright image
4. does convex mirror have a (+) or (-) focal length? how about concave mirror?
convex (-) focal length

concave mirror (+)
5. formula for index of refraction
n=c(speed of light)/v (speed in the medium)
6. Snell's law
n1sin()1=n2sin()2
7. under what conditions will light undergo total internal reflection
when light travels from higher index to lower index at angle greater than critical angle
8. does converging lens have a (+) or (-) focal legth? how about diverging lens?
• converging (+)
• diverging (-)
9. (t/f) the real side of lens is the side opposite from the light source
true
10. formula for lens power
P=1/focal length
11. formula for calculating the energy of a photon
• E=hf or E=hc/wavelength
• h-Planck's constant
12. photoelectric effect
electron are emitted by a metal that is exposed to light of sufficiently high energy
13. formula for kinetic energy of an emitted electron
KE=h(f-fT) where fT is theshold frequency
14. what happens when a electron jumps from a higher energy level to lower (orbit)?
will emit a photon whose energy equals the difference in energy btwn the two orbits.
15. what happens to atom's mass and atomic number when an alpha particle is emitted (alpha decay)
• atomic number -2
• mass number -4
16. what happens to atomic /mass number after beta- decay?how about beta+ (positron) decay ?
• beta-, the atomic number +1
• beta+, th atomic number -1

no change of mass number
17. what happen to atomic/ mass number after gamma decay
no change to both

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 Author: allenwhycheng ID: 59716 Filename: MCAT PHYSICS 3 Updated: 2011-01-14 03:35:55 Tags: mceat physics study flashcards Folders: Description: studying to be a doctor Show Answers:

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