- #1

indiansfan4life

- 16

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10. the picture that we see in a mirror is called the

my answer=image

11. the actual object that makes a picture that we see on a mirror is called the

my answer=specular

-problems- show your work

15. What is the wavelength of a wave with a frequency of 100.4 MHz?

16. A substance allows light to travel through it with a velocity of 2.45 x10^8 m/s. What is the substances index of refraction?

17. What is the intensity of a light that has a lumnious flux of 750 lumens?

18. What is the illuminance provided by a light with a luminous flux of 1120 lm when it is 2.3 meters away?

19. What would the angle of refraction be if a light ray starts in a diamond and goes into the air it has an angle of incidence of 9 degrees.

20. What is the critical angle of light going from quartz to air?

22. What is the illuminance of a light when it is 4.6 m away from a light with an intensity of 78 candle power?

thanks for any help I don't know what I am doing

Here's my answers:

#15: .335 m

#16: 1.22

#17: I was not sure how to do this one.

#18: I was also not sure how to do this one.

#19: 24.44 degrees

#20: 40.37 degrees

#22. 3.6