Light strikes the top surface of a glass block at an angle of 15 ° as shown. The refractive index of glass is 1.5.

What is the angle of refraction r ?

a
50 °
b
40 °
c
23°
d
10 °
Question 2 (1 point)
The diagram shows a ray of monochromatic light passing through a semi-circular glass block.

What is the refractive index of the glass?

a
1.31
b
1.56
c
0.77
d
0.64
Question 3 (1 point)
What causes the change in direction when light travels from air into glass?

a
The speed of the light changes
b
The frequency of the light changes
c
The colour of the light changes
d
The amplitude of the light changes
Question 4 (1 point)
Which diagram shows what happens when a ray of light passes through a glass prism?

a
A
b
B
c
C
d
D
Question 5 (1 point)
Each prism or mirror in a periscope turns a ray of light through an angle of:

a
90
b
180
c
45
d
360
Question 6 (1 point)
Light is refracted at a boundary between two media of refractive indices n1 and n2 respectively as shown below.

Which of the following statements is TRUE ?

a
The frequency of the light in medium 1 is greater than in medium 2
b
If the angle x increases, angle y will increase
c
Light travels faster in medium 2 than it does in medium 1
d
n1 is greater than n2
Question 7 (1 point)
The diagram below shows the passage of a ray of light through a rectangular glass block.

From the diagram, the refractive index of the block could be found from:

a
Sine m/ Sine n
b
Sine 90 / Sine n
c
Sine m/ Sine l
d
Sine l / Sine 90
Question 8 (1 point)
This question refers to the following diagram.

A ray of light passes from paraffin into air at an angle of incidence of 28°. if the refractive index of paraffin is 1.44, the value of sine x is:

a
sine 28 / 1.44
b
1.44 / sine 62
c
1.44 x sine 28
d
1.44 / sine 28
Question 9 (1 point)
The refractive index of a transparent medium with a critical angle , c , for light travelling from the medium to air is:

a
sine 90 / sine c
b
1 / c
c
sine c
d
90 / sine c

relativism, roughly put, is the view that truth and falsity, right and wrong, standards of reasoning, and procedures of justification are products of differing conventions and frameworks of assessment and that their authority is confined to the context giving rise to them. more precisely, “relativism” covers views which maintain that—at a high level of abstraction—at least some class of things have the properties they have (e.g., beautiful, morally good, epistemically justified) not simpliciter, but only relative to a given framework of assessment (e.g., local cultural norms, individual standards), and correspondingly, that the truth of claims attributing these properties holds only once the relevant framework of assessment is specified or supplied. relativists characteristically insist, furthermore, that if something is only relatively so, then there can be no framework-independent vantage point from which the matter of whether the thing in question is so can be established.

relativism has been, in its various guises, both one of the most popular and most reviled philosophical doctrines of our time. defenders see it as a harbinger of tolerance and the only ethical and epistemic stance worthy of the open-minded and tolerant. detractors dismiss it for its alleged incoherence and uncritical intellectual permissiveness. debates about relativism permeate the whole spectrum of philosophical sub-disciplines. from ethics to epistemology, science to religion, political theory to ontology, theories of meaning and even logic, philosophy has felt the need to respond to this heady and seemingly subversive idea. discussions of relativism often also invoke considerations relevant to the very nature and methodology of philosophy and to the division between the so-called “analytic and continental” camps in philosophy. and yet, despite a long history of debate going back to plato and an increasingly large body of writing, it is still difficult to come to an agreed definition of what, at its core, relativism is, and what philosophical import it has. this entry attempts to provide a broad account of the many ways in which “relativism” has been defined, explained, defended and criticized.

explanation:

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.