Contents

The shiny surface has ----------.
a) narrow specular reflection range
b) wide specular reflection range
c) medium specular reflection range               
d) None of these

a

In phong model, for dull surface assigned ---------- to specular reflection parameter.
a) large value nearly 100                  
b) small value nearly 1
c) medium value nearly 50                               
d) None of these

b

The intensity of specular reflection depends on the :
a) Material properties of the surface              
b) Angle of incidence
c) Specular reflection coefficient     
d) All of these

d

Which is the correct equation of specular reflection?
a) I
𝓈𝓅𝒸 = 𝒦𝓈I (𝒱 + ℛ)-ns    
b) I
𝓈𝓅𝒸 = 𝒦𝓈I (𝒱 × ℛ)-ns
c) I𝓈𝓅𝒸 = 𝒦𝓈I (𝒱 + ℛ)ns                                 
d) I
𝓈𝓅𝒸 = 𝒦𝓈I (𝒱 . ℛ)ns

d

Identify the correct band of visible light.
a) 700 nm - 1400 nm
b) 500 nm - 900 nm
c) 400 nm - 700 nm 
d) 500 nm - 800 nm

c

Choose below statement are true or false:
1. Frequency is material dependent.
2. The speed of the light and wavelength is material dependent.
a) 1. True, 2. True               
b) 1. True, 2. False
c) 1. False, 2. True             
d) 1. False, 2. False

c