Question 1

An object of length 3.00 cm is inside a plastic block with index of refraction 1.40.If the object is viewed from directly above, what is the length of its image?

Accepted Answer

The answer of An object of length 3.00 cm is...

Question 2

Parallel rays of light that hit a concave mirror will come together:

Accepted Answer

Parallel rays of light that hit a concave mirror will converge and come together at the focal point.

Question 3

When the reflection of an object is seen in a convex mirror the image will:

Accepted Answer

Convex mirrors always produce virtual images, which are upright and appear smaller than the actual object.

Question 4

Atmospheric refraction of light rays is responsible for:

Accepted Answer

Atmospheric refraction can cause mirages, which are optical illusions where distant objects appear to be distorted or displaced due to the bending of light rays as they pass through layers of varying air density.

Question 5

An object of length 3.00 cm is inside a plastic block with index of refraction 1.40.If the object is viewed through the top surface of the block at a non-zero angle from the normal, where is the object relative to its image?

Accepted Answer

When an object is viewed through a medium of higher refractive index, the image appears closer to the surface of the medium. Since the object is viewed at an angle, the image will be displaced laterally. Therefore, the object will be below the direction of its image.

Question 6

If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?

Accepted Answer

Atmospheric refraction causes the apparent position of the sun to be slightly above its true position, causing sunrise to appear earlier and sunset to appear later than they actually occur. Without atmospheric refraction, the opposite would be true: sunrise would appear later and sunset would appear earlier. Therefore, choice C is correct.

Question 7

A girl is standing in front of a concave mirror.Consider two rays of light, one from her nose and one from her mouth that are parallel as they are traveling toward the mirror.These rays will come together:

Accepted Answer

In a concave mirror, the rays of light that are parallel to the principal axis converge at a point on the principal axis called the focal point. Therefore, the two parallel rays from the girl's nose and mouth will also converge at the focal point if they are reflected by a concave mirror.

Question 8

A solid glass sphere with a radius of 5.00 cm and index of refraction of 1.52 has a small coin embedded 3.00 cm from the front surface of the sphere.For the viewer looking at the coin through the glass, at what distance from the front surface of the glass does the coin's image appear to be located?

Accepted Answer

The answer of A solid glass sphere with a radius...

Question 9

A 3.0 cm tall object is placed along the principal axis of a thin convex lens of 30.0 cm focal length.If the object distance is 40.0 cm, which of the following best describes the image distance and height, respectively?

Accepted Answer

The answer of A 3.0 cm tall object is placed...

Question 10

When the reflection of an object is seen in a concave mirror the image will:

Accepted Answer

The image formed by a concave mirror can be either real or virtual, depending on the position of the object relative to the focal point of the mirror. If the object is located beyond the focal point, the image will be real, inverted and diminished in size. If the object is located between the focal point and the mirror, the image will be virtual, upright and enlarged in size. If the object is located at the focal point, there will be no image formed.

Question 11

A candle is 49.0 cm in front of a convex spherical mirror of radius of curvature 70.0 cm.What are the image distance and the magnification, respectively?

Accepted Answer

The answer of A candle is 49.0 cm in front...

Question 12

An object 2 cm high is placed 10 cm in front of a mirror.What type of mirror and what radius of curvature is needed for an image that is upright and 4 cm tall?

Accepted Answer

Since the image is upright, we know it is a virtual image. Therefore, the mirror must be concave. Additionally, since the image is larger than the object, the image is magnified, meaning the radius of curvature must be greater than 10 cm (the distance between the object and the mirror). The only option that satisfies these conditions is choice B, which has a concave mirror with a radius of curvature of 40 cm.

Question 13

An object is placed 10 cm in front of a mirror, and an image is formed that has a magnification of 2.Which of the following statements is false?

Accepted Answer

Both statement A and B are true. From the given information, we can determine that the focal length of the mirror must be 20 cm (using the equation 1/f = 1/10 + 1/di, where f is the focal length and di is the image distance). The magnification being 2 tells us that the image is inverted and larger than the object, which means it must be virtual (since a real image would be inverted but smaller than the object). Therefore, statement D is false.

Question 14

An object is placed 10 cm in front of a mirror, and an image is formed that has a magnification of 2.Which of the following statements is true?

Accepted Answer

The answer of An object is placed 10 cm in...

Question 15

An object is 12.0 cm from the surface of a spherical Christmas tree ornament that is 8.00 cm in diameter.What is the magnification of the image?

Accepted Answer

The answer of An object is 12.0 cm from the...

Question 16

Ron fills a beaker with glycerin (n = 1.473) to a depth of 5.0 cm.If he looks straight down through the glycerin surface, he will perceive the liquid to be what apparent depth?

Accepted Answer

The apparent depth is calculated using the formula: apparent depth = actual depth / refractive index. 
In this case, the actual depth is 5.0 cm and the refractive index of glycerin is 1.473. 
Therefore, the apparent depth is: 5.0 cm / 1.473 = 3.4 cm. 
So the correct choice is C.

Question 17

A glass block, for which n = 1.52, has a blemish located 3.2 cm from one surface.At what distance from that surface does the image of the blemish appear to the outside observer?

Accepted Answer

The answer of A glass block, for which n =...

Question 18

A container is filled with fluid 1 and the apparent depth of the fluid is 5 cm.The container is next filled with fluid 2, and the apparent depth of this fluid is 4 cm.What is the ratio of the indices of refraction of these fluids?

Accepted Answer

The answer of A container is filled with fluid 1...

Question 19

A goldfish is swimming in water (n = 1.33) inside a spherical plastic bowl of index of refraction 1.33.If the goldfish is 10 cm from the front wall of the 15-cm radius bowl, where does the goldfish appear to an observer in front of the bowl?

Accepted Answer

The answer of A goldfish is swimming in water (n...

Question 20

A container is filled with fluid 1, and the apparent depth of the fluid is 5.00 cm.The container is next filled with fluid 2, and the apparent depth of this fluid is 4.00 cm.If the index of refraction of the first fluid is 1.60, what is the index of refraction of the second fluid?

Accepted Answer

The answer of A container is filled with fluid 1,...

Quiz 23: Mirrors and Lenses