** 21) Hue of color is related to?**

(A) Luminance

(B) Saturation

(C) Incandescence

(D) Wavelength

** 22) The phenomenon of having a continuous glow of a beam on the screen even after it is removed is called as?**

(A) Fluorescence

(B) Persistence

(C) Phosphorescence

(D) Incandescence

** 23) The line 2x - y + 4 = 0, if clipped against this window will connect the points?**

(A) (0, 1) and (3, 3)

(B) (0, 1) and (2, 3)

(C) (1, 2) and (4, 2)

(D) None of above

** 24) Reflection of a point about x-axis, followed by a counter-clockwise rotation of 900, is equivalent to reflection about the line?**

(A) x = -y

(B) y = -x

(C) x = y

(D) x + y = 1

** 25) The point at which a set of projected parallel lines appear to coverage is called as a?**

(A) convergence point

(B) vanishing point

(C) point of illusion

(D) point of delusion

** 26) The basic element of a picture in volume graphics is?
**

(A) pixel

(B) volsel

(C) voxel

(D) None of above

** 27) Let R be the radius of a circle. The angle subtended by an arc of length R at the center of
the circle is ?**

(A) 1 degree

(B) 1 radian

(C) 45 degree

(D) None of these

** 28) A circle, if scaled only in one direction becomes a ?
**

(A) parabola

(B) hyperbola

(C) ellipse

(D) remains a circle

** 29) A bilinear transformation can be simulated by the transformation?**

(A) transformation, rotation and stretching

(B) translation and rotation

(C) rotation, stretching and inversion

(D) rotation, stretching, inversion and translation

** 30) The anti - aliasing technique which allows shift of 1/4,1/2 and 3/4 of a pixel diameter
enabling a closer path of a line is?**

(A) Pixel phasing

(B) Filtering

(C) Intensity compensation

(D) Sampling technique