refraction and human eye

Two characteristics of a plane mirror image are ___ and ___.

[1 word each]

[Format: ans; ans]

What happens when light falls on an opaque object?

• the light moves arround the object

• all the light is blocked and a shadow is formed

• all the light passes through the object

• some of the light passes through the object

Light with a shorter wavelength has ___

• less energy
• more energy
• a smaller velocity
• a greater velocity

Light with a wavelength that the human eye can detect is called ___

• visible light
• ultraviolet light'
• infrared light
• invisible light

What is the "screen" at the back of your eye is called?

• Retina
• Eyeball
• Cornea
• Iris

Light with the longest wavelengths of all are called ___

• gamma rays
• x-rays
• microwaves
• radio waves

What happens when light hits a shiny or smooth surface?

• It disappears.

• It is refracted.

• It is absorbed.

• It is reflected.

Which colour absorbs the most light?

• Black

• White

• Blue

• Red

Bouncing of a light ray when it strikes any surface is called ___.

• absorption

• dispersion

• reflection

• refraction

When NASA scientists communicate with the mars rover, shown in the illustration, they use electromagnetic radiation with a long wavelength and low energy.

Which type of radiation do they MOSTLY LIKELY use?

• X-rays

• Visible

• Radio

• Infrared