questions
The woodchuck came bumbling along the shoulder of Route 119, headed in the direction of Chester’s Mill, although the town was still a mile and a half away and even Jim Rennie’s Used Cars was only a series of twinkling sunflashes arranged in rows at the place where the highway curved to the left.

Q 1: What's the meaning of 'sunflash'?

sunflash, sunshine, sunlight

Q 2: Are they the same meaning? If not, what's the difference between them?

Question

questions
The woodchuck came bumbling along the shoulder of Route 119, headed in the direction of Chester’s Mill, although the town was still a mile and a half away and even Jim Rennie’s Used Cars was only a series of twinkling sunflashes arranged in rows at the place where the highway curved to the left.

Q 1: What's the meaning of 'sunflash'?

sunflash, sunshine, sunlight

Q 2: Are they the same meaning? If not, what's the difference between them?

Answer

A flash is of short duration. As you move, you change angles, so your view of the light reflecting off of the cars will change as well.