Unit 8: Light by Jessica Perez https://padlet.com/jessicap132/lu250uz9591v en-us 2018-05-08 13:05:09 UTC 2025-12-23 03:15:03 UTC hello@padlet.com 1) Give 3 Examples of electromagnetic radiation? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258886396 2018-05-08 13:08:13 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258886396 2) When light enters a piece of glass from air, its speed ______ jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258887527 2018-05-08 13:10:33 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258887527 3) If a diamond has an index of refraction 2.51, what is the speed of light through this object ? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258887791 2018-05-08 13:11:07 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258887791 4) A ray of light in the air is incident on a glass boundary at an angle of 40 degrees with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refraction in the glass ? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258888814 2018-05-08 13:13:10 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258888814 7) If you stand 0.75 meters in front of a plane mirror, what is the apparent distance between you and your image ? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258890810 2018-05-08 13:16:26 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258890810 5) A ray in the air is incident on a glass boundary at an angle of 30 degrees and is refracted in the glass at 20 degrees with the normal. what is the index of refraction of the glass ? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258891732 2018-05-08 13:18:19 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258891732 8) A concave mirror with a focal length of 12 cm creates a real image 30 cm away on it principal axis; the corresponding object is located how far from the mirror ? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258892617 2018-05-08 13:20:16 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258892617 9) What is the focal length of a mirror whose radius of curvature is 22 cm? jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258893496 2018-05-08 13:22:02 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258893496 10) A candle was placed 36 cm from a converging lens. the image of the candle was inverted and appeared 20 cm from the lens. What is the focal length of the lens jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258894217 2018-05-08 13:23:16 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258894217 6) If total interval reflection occurs at a glass to air surface jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258896028 2018-05-08 13:27:19 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258896028 #1 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258899494 x-rays, light, infrared ]]> 2018-05-08 13:34:25 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258899494 #2 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258899995 decreases ]]> 2018-05-08 13:35:42 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258899995 #3 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258902932 3x10^8/ 2.51x10^8
=1.195 round the number and get 1.20.
the answer is 1.20 x 10^8]]> 2018-05-08 13:41:59 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258902932 #4 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/258903963 sin(40)/ sin(1.65) =
22.32 degrees

]]> 2018-05-08 13:44:18 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/258903963 #5 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/259595890 sin(3) / sin(20) =
1.46]]> 2018-05-10 13:05:46 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/259595890 #6 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/259596164 No angle of refraction ]]> 2018-05-10 13:06:25 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/259596164 #7 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/259596243 0.75 x 2 =
1.5m]]> 2018-05-10 13:06:38 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/259596243 #8 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/259596417 1/f=1/di + 1/do
1/12= 1/30 + 1/do
1/12 - 1/30= 1/20
20/1=f/1
20=f ]]> 2018-05-10 13:07:04 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/259596417 #9 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/259596937 22cm/ 2= 11cm]]> 2018-05-10 13:08:24 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/259596937 #10 jessicap132 https://padlet.com/jessicap132/lu250uz9591v/wish/259597112 1/f = 1/di + 1/do
1/f = 1/20 + 1/36
1/f = 7/90
f/1= 90/7
f= 12.9 cm ]]> 2018-05-10 13:08:51 UTC https://padlet.com/jessicap132/lu250uz9591v/wish/259597112