The planet that is normally farthest from the Sun, but sometimes ...

[skymedlock]

The planet that is normally farthest from the Sun, but sometimes is not, is ______________.
 Fill in the blank(s) with correct word

Question 2

The speed of light in a particular transparent medium is 2/8 the speed of light in a vacuum. What is the index of refraction of the material?
 a. 1.3
  b. 0.75
  c. 4
  d. 0.25

Question 3

On a bright and sunny day, the intensity of solar radiation on the Earth's surface is 1 000 W/m2 . If the average wavelength of the sunlight is 500 nm, how many photons are incident on a square meter of the Earth's surface per second?

Question 4

The planet ______________ has retrograde motion.
 Fill in the blank(s) with correct word

Question 5

A particular material has an index of refraction of 2.75 . What percent of the speed of light in vacuum is the speed of light in the material?
 a. 36
  b. 10
  c. 8
  d. 89

Question 6

What is the energy in eV of a photon of yellow light?  = 500 nm.

[zacnyjessica]

Answer to Question 1

Pluto

Answer to Question 2

c

Answer to Question 3

2.51  1021 photons/s

Answer to Question 4

Uranus

Answer to Question 5

a

Answer to Question 6

2.48 eV

[skymedlock]

TYSM

[Animal_Goddess]

Thanks for the timely response, appreciate it