Below is a moving device consisting of two small and large disks with the same centers and symbols placed at equal intervals on them. A rectangular fixed indicator is placed on top of this device. These two disks moving at constant speeds in the direction of the arrow: the small disk rotates $90 ^ { \circ }$ per second. When the small disk completes one full rotation, the large disk rotates $90 ^ { \circ }$. For example; 10 seconds after the beginning, the following view is obtained in the device and the indicator appears as $\square$. What is the appearance of the indicator 100 seconds after the beginning? (See answer choices A)–E) with figures in original paper.)
Below is a moving device consisting of two small and large disks with the same centers and symbols placed at equal intervals on them. A rectangular fixed indicator is placed on top of this device.
These two disks moving at constant speeds in the direction of the arrow: the small disk rotates $90 ^ { \circ }$ per second. When the small disk completes one full rotation, the large disk rotates $90 ^ { \circ }$.
For example; 10 seconds after the beginning, the following view is obtained in the device and the indicator appears as $\square$.
What is the appearance of the indicator 100 seconds after the beginning?
(See answer choices A)–E) with figures in original paper.)