Light and Optics

Which of the following are the characteristics of the image formed in a plane mirror?

• Virtual and upright

• Virtual and inverted

• Real and inverted

• Real and upright

what is the cause of the phenomenon?

• Summation of light

• Dispersion of light

• Scattering of light

• Reflection of light

During thunder, light in the form of __________ will be seen first before sound is heard.

• rain

• lightning

Lights does not refracted when angle of incident is _______ to ______.

• equal, 90^o

• equal, 45^o

• not equal, 90^o

• not equal, 45^o

Light refracted __________ normal when move from more dense to less dense mediums.

• away from

• towards

A student placed a pencil in a cup of water.  The pencil appears broken because light-

• always travels in a straight line
• bends when it passes through water
• makes the water in the glass evaporate
• reflects the pencil on the water's surface

The diagram below shows a fish being viewed from above the water. The fish appears to be closer to the surface than it really is. What causes this difference?

• Light is reflected.

• Light is refracted.

• Light is focused.

• Light is blocked.

When light travels through air into a prism, it bends and separates into many colors. In which other situation does light bend?

• When light moves through air into water

• When light hits a wall

• When light passes through outer space

• When light hits a mirror

Some students are feeding a crab in an aquarium. They use tongs to place the food directly in front of the crab. The students look through the side of the aquarium. They notice that the image of the tongs appears to break as the tongs enter the water. Which property of light are the students observing in this situation?

• Light can be refracted and separated into different colors as it moves from air to a different medium.

• Light is refracted as it moves from one medium to another medium.

• Light travels in a straight line and can be reflected off the surface of water.

• Light is absorbed by water and reflected off glass.

A mirror can produce a clear image due to __________.

• the index of refraction

• translucent properties

• regular reflection

• diffuse reflection