- 2070 Chaitra · 4 marks
Time to scan one row of pixels
Short answer
Frame time = 1/60 s. With 768 rows (ignoring retrace), time per row = (1/60)/768 ≈ 21.7 µs.
How much time is spent scanning across each row of pixels during screen refresh on a raster system with resolution 1024×768 and a refresh rate of 60 frames per second?
Time for one frame = 1 / 60 s = 16.667 ms. This time is shared among 768 rows (ignoring horizontal and vertical retrace time).
Time per row = (1/60) / 768
= 1 / 46,080 s
= 2.17 × 10⁻⁵ s ≈ 21.7 µs
Answer: about 21.7 µs per row of pixels.
✓ Answer checked by Claude Opus 5.5 (high effort)
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