The twinkling of the stars is due to the reason that

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

Answer

Answer

B. The refractive index of Earth’s atmosphere fluctuates

Submitted by: Toheed Ahmed

Silicon is a ________?

A. Semi-conductor
B. Insulator
C. Conductor
D. Superconductor

Answer

Answer

A. Semi-conductor

Submitted by: Toheed Ahmed

The speed of sound is _________?

A. 300 meter per second
B. 315 meter per second
C. 340 meter per second
D. 362 meter per second

Answer

Answer

C. 340 meter per second

Submitted by: Toheed Ahmed