Physics Answers

The speed of light in a certain substance is only 92% of what it would be in a vacuum. What is the index of refraction of this substance?

How far (in cm) would light travel through diamond in 1.00 μs?

Question 29 (4 points)

You place an object 22 cm in front of a concave lens with a focal length of -35 cm. Find the image distance and magnification that results from this arrangement.

Question 29 options:

A) 

-0.34

B) 

No option is correct

C) 

-0.64

D) 

-0.55

E) 

-0.45

Question 28 (4 points)

Light is reflected from a glass coffee table. When the angle of incidence is 60.2⁰, the reflected light is completely polarized parallel to the surface of the glass. What is the index of refraction of the glass?

Question 28 options:

A) 

2.26 x 10^-8 s

B) 

4.46 x10^-8 s

C) 

3.36 x 10^-8 s

D) 

No option is correct

E) 

5.56 x 10^-8 s

A ray of light impinges from air onto a block of ice (n = 1.309) at a 50.0⁰ angle of incidence. Assuming that this angle remains the same, find the radio of the angles of refraction (Ѳ_{2, ice} = Ѳ_{2, water}) when the ice turns to water (n = 1.333).

Question 26 options:

A) 

2.02

B) 

4.02

C) 

No option is correct

D) 

1.02

E) 

3.02

Question 25 (2 points)

The speed of light in a certain substance is only 92% of what it would be in a vacuum. What is the index of refraction of this substance?

Question 25 options:

A) 

3.1

B) 

4.1

C) 

No option is correct

D) 

1.1

E) 

2.1

Question 24 (2 points)

How far (in cm) would light travel through diamond in 1.00 μs?

Question 24 options:

A) 

4.24 x10⁴ cm

B) 

1.24 x10⁴ cm

C) 

No option is correct

D) 

3.24 x10⁴ cm

E) 

2.24 x10⁴ cm

Question 23 (2 points)

The objective of a telescope must be of large diameter in order to

Question 23 options:

A) 

Increase its range of observation

B) 

Remove spherical aberration and high magnification

C) 

No option is correct

D) 

Remove chromatic aberration

E) 

Gather more light and for high resolution

Question 22 (2 points)

When light is refracted into a medium

Question 22 options:

A) 

its wavelength increases but frequency remains unchanged

B) 

its wavelength decreases but frequency remains unchanged

C) 

its wavelength and frequency both decrease

D) 

No option is correct

E) 

its wavelength and frequency both increases

A laser beam is reflected off a mirror at an angle of 25⁰ to the surface. Find the angle between the incident and reflected beams of light.