USE LINK FOR Q1 AND Q2

https://www.youtube.com/watch?v=sd0BOnN6aNY

Q1. What is the difference between specular and diffuse reflection? Please, use own words! Q2. How big is the angle of reflection when compared with the angle of incidence?

LINK FOR Q3 AND Q4

Q3. Describe refraction in own words. Q4. How big is the angle of refraction when compared with the angle of incidence?

Light Waves

Visible light can also be considered as one small section of the electromagnetic wave spectrum. Different colors have different wave lengths and different frequencies. However, all of the electromagnetic waves move at the speed of light, c, which has in vacuum and air a value of 3.0x10⁸ m/s. The Index of Refraction, n The speed of light in any other material is less than the speed of light in vacuum by a factor of 1/n with n being the index of refraction for a specific material. n = 1.000 is the index of refraction in vacuum, n = 1.0003 is the index of refraction in air.

speed of light in a specific material == speed of light in vacuum / index of refraction

c_n = c / n

Q5. What is the index of refraction in water? What is the speed of light in water? Q6. Find out what the distance between the Sun and the Earth is. Calculate from this distance and the speed of light how long it takes the light to travel from the Sun to come to the Earth.

USE LINK FOR Q7

https://www.youtube.com/watch?v=cfXzwh3KadE

Electromagnetic wave (EM waves) are transverse waves of electric and magnetic fields. Electric and magnetic fields are not associated with matter, which means that they can also travel in a vacuum.

Q7. Find at least 5 types of waves in the electromagnetic wave spectrum and order them by their wavelengths. Include a description of the usage of each of these waves.

Q8. Explain in own words what the differences between reflection, refraction, and diffraction are. Q9. Explain for each of the following whether reflection, refraction, and/or diffraction are the principles behind the object or phenomenon: a.) Eye glasses b.) rainbow c.) colors on a CD or DVD d.) mirror e.) magnifying glass. Q10. What are the waves called that have wavelengths just beyond the visible light spectrum? What are they used for? Q11. You attend a concert and have a seat that is 70 m away from the stage where the sound is produced. How long does it take for the sound to reach your ears? You take a picture with your phone and send it to your friend who could not come to the concert. She lives in a town 45 miles away. How long does it take until she gets the picture on her phone? Please, include the assumptions that you make. Q12. Why do you think the Doppler Effect is called a red-shift or a blue-shift when it affects light? Q13. Find out how night-vision equipment works - report your findings and sources here. Q14. Find out what fiber optics is and report your findings and sources here.