Which optical devices spread light apart? A. A and B
B. A and D
C. B and D
D. B and C

Actually Welcome to the Concept of the Optical Devices.

Now basically here the devices that can spread light over apart are the CONCAVE LENS and Convex mirror.

so the Answer is

C. B and D

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i just did this and got a 100.

0.11 m/s and 0.28 m/s should be correct