1. Which correctly shows the sequence of the electromagnetic spectrum from the greatest to the least frequency?

A. VIBGYOR
B. ROYGBIV
C. ROBIVYG
D. VVIBROY

2.Which is NOT true about sound? *

A. The higher the temperature, the faster the sound travels
B. The denser the material, the faster the sound travels
C. The speed of sound increases as the temperature decreases
D. The more elastic the material, the faster the sound travels​