A. Plane mirror
B. Concave mirror
C. Convex lens
D. Convex mirror
A. Blood Pressure
B. Atmospheric Pressure
C. Pressure at the workplace
D. Lung Pressure
A. The stars do not emit light continuously
B. The refractive index of Earth's atmosphere fluctuates
C. Intermittent absorption of star; light by Earth's atmosphere
D. Intermittent absorption of star; light by stars' atmosphere
A. AVO meter
B. Ammeter
C. Galvanometer
D. Ohmmeter
A. Insulator
B. Semi-conductor
C. Conductor
D. Superconductor
A. 300 meter per second
B. 315 meter per second
C. 340 meter per second
D. 362 meter per second
A. Infrared waves
B. Radio waves
C. Light waves
D. X-waves