Answer:
When heat gets transferred through electromagnetic waves that move through space
.
Explanation:
Radiation is the propagation of energy in the form of electromagnetic waves or subatomic particles through a vacuum or a material medium.
Answer:
The fox who shed their heavy coat in the summer.
Explanation:
If a fox has the ability to shed its coat in the summer, it will have no difficulties adapting to new temperatures even during winter. However, the heavy-coated one will.
Answer:
When ray of light moves from air to water its speed changes and it bent away from surface.
Explanation:
When ray of light moves from less denser to more denser medium such from air to water its speed slow down and ray bent away from the surface (surface between air and water). The refraction is occur.
Refraction:
It is bending of light when it passes from one to another material.
It is measure as:
n = c / v
n = refractive index
c = speed of light in air
v = speed of light in medium
For example:
The refractive index of water is 1.33 it means light travel 1.33 times faster in vacuum as compared to water.
A ray of light passes from air to water and it bent away from the surface. The angle of refraction is less than the angle of incidence.
The bending also occur when light come from water and inter into air.
Answer:
Group 18 elements
Noble gases
Explanation:
The gases in the last group of the periodic table exist in nature in uncombined state. Due to their nature of passiveness, they are called inert gases.
Other names include the noble gases. They are as follows
Helium
Neon
Argon
Radon
Xenon
These elements occur in as mono atomic atoms. Hence, they have an atomicity of 1