Light and Optics SG

Which explains why the fork looks different under water?

the light is refracted as it passes through different mediums

What is true about the image shown here?

the reflections get darker because some light always absorbed by the mirror

Opaque means

No light passes through it

What color has the shortest wavelength, or the highest frequency?

Violet

EM waves have the same speed but different

wavelength & frequency

If the magnification of an image formed by a mirror is negative, then…

c. the mirror must be concave

In this diagram, which is the angle of incidence?

Angle B

The way that a surface reflects light depends on its texture. Rough surfaces such as cloth and wood tend to scatter light, reflecting it in many different directions. This type of reflection is called

diffuse reflection.

The way that a surface reflects light depends on its texture. Smooth, shiny surfaces such as mirrors reflect light in a uniform (or close to uniform) direction. This type of reflection is called

specular reflection.

A ray of light is incident towards a plane mirror at an angle of 30-degrees with the mirror surface. What will be the angle of reflection?

60 degrees

A particle of visible light or other electromagnetic radiation is called a.... Photon

The point where the rays meet is known as....

the focal point

If you're standing 12 meters in front of a plane mirror, how far away is your image from YOUR POSITION?

24

Why does green grass look green?

It absorbs all colors except green.

If you wanted to produce a real, smaller, inverted image of an object, you would place the object?

f. further away than the radius of curvature

What object is represented by this diagram?

Convex lens

When light passes from one medium to a denser medium _________.

it is bent towards the normal.

Light has the highest velocity in which medium? flint glass n=1.70 barium glass n=1.60 crown glass n=1.523 water n=1.33 diamond n=2.45

Water

This diagram is an example of...

a diffuse reflection

Given that the angle of incidence = 30 degrees Which is the correct diagram? D

The formula to calculate the refractive index is

n=c/v

An image that forms where light seems to come from a point but light rays don't actually meet is

a virtual image

If the object is between C and f for a concave mirror, the image is ...

image is real, bigger, and inverted

Which of the lens diagrams have Virtual Images? (choose all)

Skinny rectangle and regular square

Which represents the reflected ray?

D

Which statement is true about convex mirrors?

they always produce smaller virtual images

Which of the following numbers could possibly be a value for the index of refraction for a particular material?

2.25

Which is true about the image formed by this lens? (chose two)

The magnification is negative, and the magnification is greater than one

If the object is between C and F of the concave mirror, the image formed is ...

real, bigger, and inverted

If these are all diagrams for mirrors, which statement is correct?

This MUST be a concave mirror.

An incident ray that travels to a mirror parallel to the optical axis...

will reflect through the focal point

Convex Mirrors are

c

Which mirror would have the shortest focal length?

C

Which of the following statements is true about the diagram?

c. the magnification is greater than one

Which statement is true about this ray diagram?

none of these statements are true

A student is 2.50m away from a convex lens while her image distance is positive 1.80m, what is the focal length for this lens?

1.05m

An object is placed at a distance of 27.0 cm away from a convex lens with a focal length of 9.00 cm. How far from the lens is the image located and what type of image is formed?

13.5 cm and real

Light travels from air (n = 1.000) into an optical fiber. If the angles of incidence and refraction are 22oand 15º respectively. which answer best represents the index of refraction of the fiber?

1.45

Light in a particular medium travels at 70% the speed of light in a vacuum, which value best represents the index of refraction for that medium?

1.43

A converging lens produces an image twice the size of the original. If the object is placed 40 cm from the lens, and the image produced is 80 cm from the lens. What is the focal length of the lens?

26.7 cm

A 20 cm tall object is placed 60 cm in front of a convex lens that has a focal length of 10 cm. What is the size of the image produced?

-4 cm

An object is at a distance of 36cm from a concave mirror of focal length 12 cm. Find the image distance.

18cm

A ray of light traveling from air into crown glass enters at an angle of 30 degrees to the surface of the glass.. Which value is best approximation for the angle of refraction? (air n=1, crown glass n=1.532)

39 degrees

If light travels at 1.76 EE 8 m/s through a particular material. What is the medium?

diamond n=2.45 flint glass n=1.70 barium glass n=1.60 crown glass n=1.523

Flint Glass

The eyes of the fisherman in the diagram are 1.5 m off the ground and he is standing 2 m away from the edge of the water. If fish is at a depth of .75 m, how far away from the shore is the fish?

.57 m