Search & Filtering
Question 17 (4 points)
Some car mirrors are curved such that the image is smaller than it would be if plane mirrors were used in order to give a wider field of view. If a car is located 25.0 cm away and looks 0.2 times the size it would normally be, find the local length of this mirror.
Question 17 options:
A)
No option is correct
B)
-6.25 cm
C)
-4.25 cm
D)
-5.25 cm
E)
-3.25 cm
Question 15 (2 points)
Which of the following best describes the image formed by a concave mirror when the object distance from the mirror is less than the focal length (f)?
Question 15 options:
A)
No option is correct
B)
Real, inverted and reduced
C)
Virtual, upright and enlarged
D)
Real, inverted and enlarged
E)
Virtual, upright and reduced
A bug flying at eye level is located 15 cm in front of a plane mirror. If you are 65 cm from the bug and looking into the mirror, find the distance between your eyes and the apparent position of the bug's image in the mirror.
Question 11 options:
A)
100 cm
B)
95 cm
C)
75 cm
D)
85 cm
E)
No option is correct
Question 10 (4 points)
On the + y axis a laser is located at y = + 3.0 cm. The coordinates of a small target are x = + 12.0 cm and y = + 6.0 cm. The + x axis represents the edge-on view of a plane mirror. At what point on the + x axis should the laser be aimed in order for the laser light to hit the target after reflection?
Question 10 options:
A)
+4 cm
B)
+3 cm
C)
-3 cm
D)
- 4 cm
Question 9
An object is placed in front of spherical mirror, and the magnification of the system is m = -6. What does this number tell you about the image?
Question 9 options:
A)
The image is a real image
B)
No option is correct
C)
The image is larger than the object
D)
The image is inverted relative to the object
E)
a, b and c
Imagine that a motorist is travelling so fast that the yellow light (585 nm wavelength) from a traffic signal appears green (555 nm wavelength). Find the velocity of the motorist, assuming the positive direction is defined as moving closer to the light.
Question 8 options:
A)
1.64 x 107 m/s
B)
2.64 x 107 m/s
C)
3.64 x 107 m/s
D)
No option is correct
E)
4.64 x 107 m/s
Electromagnetic waves are
Question 7 options:
A)
Both longitudinal and transverse
B)
Transverse
C)
Longitudinal
D)
No option is correct
Question 5 (2 points)
When the light crosses a boundary between air and water, the following quantity of light remains the same.
Question 5 options:
A)
Wavelength
B)
Frequency
C)
Speed
D)
No option is correct
E)
Both (a) and (b)
Sir Albert Einstein describes light as;
Question 4 options:
A)
Waves
B)
No option is correct
C)
Thermal waves
D)
Gravitational waves
E)
Tiny particles
Unpolarized light with an intensity of 120 W falls on a polarizer and analyser. The angle between the transmission axes of the polarizer and analyser is 72°. What is the intensity of the light leaving the analyser, reaching the photocell?
Question 3 options:
A)
No option is correct
B)
11 W
C)
5.7 W
D)
60 W
E)
19 W
