Upper Sec Radiation

What form of radiation transfers heat without needing a medium?

• Ultraviolet

• Infra-red

• Visible

• Microwave

When an object emits infrared waves, what happens to its temperature?

• Remains the same

• Fluctuates

• Increases

• Decreases

How is heat transferred from the Sun to Earth?

Which factor affects the speed of radiation based on temperature?

• Surface Temperature

• Surface area

• Nature of surface

• Colour and Texture

What type of surface is the best absorber of infrared radiation/heat?

What is the purpose of cooling fins at the back of a fridge being black?

• To reflect heat

• To emit heat

• To store heat

• To absorb heat

Why do fuel storage tanks have a shiny surface?

• To store heat

• To reflect heat

• To emit heat

• To absorb heat

What is the purpose of a light-colored school uniform?

• To absorb heat

• To emit heat

• To reflect heat

• To store heat

What is the purpose of the vacuum in a vacuum flask?

• To emit heat

• To store heat

• To increase heat lost by conduction and convection

• To reduce heat lost by conduction and convection

What is the purpose of the silver wall in a vacuum flask?

• To reduce heat lost by radiation

• To increase heat lost by conduction and convection

• To store heat

• To emit heat