Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Chapter: 30
Q1021:
What surface property causes backscattering in rough surfaces?
A. Microfacet orientation
B. High gloss
C. Smoothness
D. Transparency
Correct Answer:
A
Chapter: 30
Q1022:
The Oren–Nayar model improves the traditional Lambertian model by considering _______.
A. surface smoothness
B. surface roughness
C. reflection index
D. view angle
Correct Answer:
B
Chapter: 30
Q1023:
What does the σ parameter represent in the Oren–Nayar model?
A. Surface temperature
B. Surface color
C. Surface roughness
D. Light intensity
Correct Answer:
C
Chapter: 30
Q1024:
In the Oren–Nayar model, a larger σ value means the surface is _______.
A. smoother
B. rougher
C. darker
D. brighter
Correct Answer:
B
Chapter: 30
Q1025:
Which angle represents the view direction in the Oren–Nayar model?
A. θi
B. θr
C. φi
D. φr
Correct Answer:
B
Chapter: 30
Q1026:
In forward scattering, light travels _______ after bouncing off a surface.
A. away from the source
B. back to the source
C. toward the observer
D. parallel to surface
Correct Answer:
A
Chapter: 30
Q1027:
What is the full form of kc, k1, and kq in attenuation formula?
A. Constant, linear, and quadratic factors
B. Circular, luminous, and quantized factors
C. Color, light, and quadratic
D. Constant, luminous, and quadratic
Correct Answer:
A
Chapter: 30
Q1028:
In practice, real-world light attenuation is simulated in graphics because pure inverse-square law is _______.
A. too slow
B. too steep
C. too flat
D. too complex
Correct Answer:
B
Chapter: 31
Q1029:
What is the main purpose of Physically Based Illumination in computer graphics?
A. To increase frame rate
B. To simplify rendering
C. To create realistic lighting
D. To enhance color contrast
Correct Answer:
C
Chapter: 31
Q1030:
In physically based illumination, light is treated as a _______.
A. Particle
B. Wave
C. Particle and Wave
D. Neither A nor B
Correct Answer:
B
Chapter: 31
Q1031:
What happens to light when it hits the boundary between two media?
A. Only reflection
B. Only absorption
C. Reflection and refraction
D. Only scattering
Correct Answer:
C
Chapter: 31
Q1032:
Reflection occurs when light bounces off the boundary between ________.
A. Two similar media
B. Two different media
C. Same medium
D. Single point
Correct Answer:
B
Chapter: 31
Q1033:
The angle of incidence is equal to the angle of reflection on a ________ surface.
A. Rough
B. Curved
C. Smooth
D. Transparent
Correct Answer:
C
Chapter: 31
Q1034:
The Blinn-Phong model results in reflections that resemble ________.
A. Metal
B. Plastic
C. Water
D. Wood
Correct Answer:
B
Chapter: 31
Q1035:
In refraction, light bends due to ________ between two media.
A. Density difference
B. Speed difference
C. Pressure difference
D. Temperature difference
Correct Answer:
B
Chapter: 31
Q1036:
Snell’s law is used to calculate ________ in refraction.
A. Reflected angle
B. Incident light intensity
C. Refracted angle
D. Surface normal
Correct Answer:
C
Chapter: 31
Q1037:
When light moves from air (n=1) into glass (n=1.5), the refracted angle becomes ________ the incident angle.
A. Greater than
B. Equal to
C. Less than
D. None of these
Correct Answer:
C
Chapter: 31
Q1038:
The phenomenon when light is completely reflected inside a medium is called ________.
A. Refraction
B. Reflection
C. Total internal reflection
D. Diffusion
Correct Answer:
C
Chapter: 31
Q1039:
The critical angle is associated with the phenomenon of ________.
A. Refraction
B. Total internal reflection
C. Diffusion
D. Absorption
Correct Answer:
B
Chapter: 31
Q1040:
Diamonds sparkle because of ________.
A. High critical angle
B. Low critical angle
C. High reflection index
D. Low reflection index
Correct Answer:
B