# Physics Flashcards - Light and Optics

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The flashcards below were created by user awc1990 on FreezingBlue Flashcards.

1. What is the speed of an electromagnetic wave (light) in a vacuum?
The speed of light in a vacuum is (3 x 108) m/s.
2. What type of image do plane mirrors create (real or virtual)?
Plane mirrors always create virtual images.
3. How are focal length and radius of curvature related?
Focal length =
4. What is the formula relating object distance (o), image distance (i), and focal length (f)?
+  =   =
5. Does a virtual image have a positive (+) or negative (-) image distance?
A virtual image has a negative (-) image distance.
6. If an image is in front of a mirror , is it real or virtual?
An image that is in front of a mirror is real.
7. Does a real image have a positive (+) or negative (-) image distance?
A real image has a positive (+) image distance.
8. What is the formula for magnification?

m=
m = - =
9. (T/F) A negative (-) magnification signifies an upright image.
False, a (-) magnification signifies an inverted image and a (+) magnification signifies an upright image.
10. What type of image does a diverging (convex) mirror create?
A diverging mirror always creates a virtual upright image.
11. What type of image does a converging (concave) mirror create when the object is placed beyond the focal point?
An object beyond the focal point produces a real inverted image in a converging mirror.
12. What type of image does a converging (concave) mirror create when the object is placed inside the focal point?
An object inside the focal point produces a virtual upright image in a converging mirror.
13. Does a convex mirror have a positive of negative focal length (or radius of curvature)?
A convex mirror has a negative (-) focal length and radius of curvature.
14. Does a concave mirror have a positive of negative focal length (or radius of curvature)?
A concave mirror has a positive (+) focal length and radius of curvature.
15. What is the formula for index of refraction?

n =
n =

where c = 3 x 108
16. What is the formula for Snell's Law?

n1sinθ1 = n2sinθ2
17. Under what conditions will light undergo total internal reflection?

Total internal reflection will occur when light travels from a medium with a higher index of refraction to a medium with a lower index of refraction and with an angle of incidence greater than the critical angle.

18. Are the following lenses converging or diverging?

1.

2.
1. Converging lens.

2. Diverging lens.
19. Does a converging lens have a positive (+) or negative (-) focal length?
A converging lens has a positive (+) focal length.
20. Does a diverging lens have a positive (+) or negative (-) focal length?
A diverging lens has a negative (-) focal length.
21. (T/F) The "real" side of a lens is the side opposite that from which light originates.
True.
22. What type of image does a diverging lens produce?
A diverging lens produces a virtual upright image.
23. What type of image does a converging (convex) lens create when the object is placed beyond the focal point?
An object beyond the focal point produces a real inverted image in a converging lens.
24. What type of image does a converging (convex) lens create when the object is placed inside the focal point?
An object inside the focal point produces a virtual upright image in a converging lens.
25. What are the units of power for a lens?
Diopters are the units of lens power (when f is measured in meters).
26. What is the formula for calculating lens power?

P =
27. (T/F) The splitting of white light in a prism is an example of dispersion.
True.
28. What is diffraction?
Diffraction is the spreading out of light as it passes through a narrow opening.
29. (T/F) Light waves can constructively and/or destructively interfere with each other.
True.
30. What is polarized light?
Polarized light is light in which the electric fields of all the waves are oriented in the same direction.

### Card Set Information

 Author: awc1990 ID: 212603 Filename: Physics Flashcards - Light and Optics Updated: 2013-04-10 06:45:11 Tags: Physics Flashcards Light Optics Folders: Description: Physics Flashcards - Light and Optics Kaplan MCAT P56-P63 Show Answers:

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