According to Huygen's Principal, every point on a wave front can be considered a source of secondary wavelets.

Diffraction occurs only when light passes through a narrow slit or opening.

Capacitors in series have the same charge on each capacitor.

Lenz's law states that the induced current always flows in a direction that assists the change in magnetic flux.

In a digital system, information is represented using binary numbers, 0 and 1.

Alpha particles have a higher penetrating power than grammar rays.

Capillary occurs for non-wetting liquids.

The viscosity of gases increases with an increase in temperature.

At a river junction, water streams are whirling, it is ___.

Non-conventional energy sources are continuously replenished by natural processes.

A hydropower resource cannot be evaluated by its available power.

Earth's atmosphere and cloud absorb or scatter as much as 54% of the incoming sunlight.

Harnessing the wind is highly independent on weather and location.

Non-renewable energy resources include ___.

There are ___ types of concentrated solar power.

___ is the main constituent of these fossil fuel.

Reflection of sound obeys the laws of reflection.

Cavitation bubbles are created at sites of rarefaction.

A prenatal ultrasound test uses low-frequency sound waves.

For every 10 dB added to the sound level, the loudness of the sound is increased by 10 times.

Pitch of the note is determined by its frequency.