stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Genphy review Flashcards | StudBud
Explore
/
Genphy review
Genphy review
25 terms
·
StudBud Administration
·
6 plays
Imported from external platform
Flashcards
25 cards
F
Practice quiz
P
Host live
L
Questions
25
Answers
1
A photon emitted from the
surface of a neutron star
appears
redder
when detected far away. Why?
Gravity increases its energy
Gravity decreases its frequency
The observer is moving
The star’s rotation Doppler shifts it
2
A light ray passes from air (n=1.00)into water (n=1.33) at a
30° incidence angle
. What is the refraction an
60 degrees
45.67 degrees
22.10 degrees
30 degrees
3
An astronaut crosses a
black hole’s event horizon
. What do distant observers see?
The astronaut appears frozen at the event horizon
The astronaut vanishes instantly
The astronaut moves through at normal speed
The astronaut accelerates and escapes
4
What happens when
single electrons
are fired one by one at a double slit
without measurement
?
Two bright spots appear
A single bright line appears
Electrons randomly distribute
An interference pattern forms over time
5
What happens to an object moving at speeds close to the speed of light, according to special relativity?
It moves faster than light
It expands in length
Its mass decreases
It appears shorter in the direction of motion
6
The time dilation formula is derived from:
Double-slit experiment
Lorentz equation
Wave equation
Newton's law of motion
7
In a concave mirror, if an object is placed
beyond the center of curvature (C)
, the image will be:
Virtual, upright, and larger
Real, inverted, and smaller between C and F
Real, inverted, and smaller
Real, inverted, and same size at C
8
What does the wave-particle duality of light describe?
Light is neither a wave nor a particle
Light behaves only as a particle
Light can behave both as a wave and a particle
Light behaves only as a wave
9
In Young’s double-slit experiment, what causes the
bright fringes
on the screen?
Refraction of light
Constructive interference
Reflection of light
Destructive interference
10
When a
single photon
is sent through a double slit, what is observed on the screen after many photons pass through?
An interference pattern
Two bright spots
A continuous glow
A single dot each time
11
A GPS satellite's clock runs faster due to lower gravity. What correction is needed?
Only adjust for general relativity (gravity effects)
Only adjust for special relativity (motion effects)
Account for both special and general relativity effects
No correction needed
12
What is the
critical angle
for light traveling from
water (n=1.33)
to air (n=1.00)?
60.0 degrees
48.8 degrees
41.3 degrees
50.1 degrees
13
Which experiment
proves
that light behaves as a
wave
?
Blackbody radiation
Compton scattering
Photoelectric effect
Double-slit experiment
14
An object is placed
between F and the lens
of a
convex lens
. The image is:
Real, inverted, and reduced
Virtual, upright, and magnified
Real, upright, and same size
No image forms
15
An astronaut in a
freely falling
elevator near Earth experiences:
Increased gravity
Decreased inertia
Gravitational time dilation
Weightlessness due to equivalence principle
16
Which phenomenon occurs due to time dilation in Einstein’s theory of relativity?
Gravity has no effect on time
A moving object appears longer
A moving clock runs slower compared to a stationary one
Time remains constant in all reference frames
17
What does the
first postulate
of Special Relativity state?
The laws of physics are the same in all inertial frames of reference
The speed of light is the same in all frames of reference
Time moves slower for moving objects
Objects contract in length when moving at high speeds
18
A spaceship moves at
0.8c
relative to an observer. If its proper length is
100 m
, what is its observed length?
60 m
100 m
80 m
125 m
19
A convex mirror always forms an image that is:
Real, inverted, and smaller
Virtual, upright, and larger
Virtual, upright, and reduced
Real and magnified
20
An object is placed
30 cm
in front of a concave mirror with
focal length 15 cm
. Where is the image formed?
At infinity
10 cm (virtual, upright)
50 cm (real, inverted)
30 cm (real, inverted)
21
If a light ray strikes a mirror at an
angle of incidence of 35°
, what is the angle of reflection?
90 degrees
55 degrees
35 degrees
70 degrees
22
In Young’s double-slit experiment, what pattern is observed on the screen?
A continuous gradient of light
A single bright spot
Alternating bright and dark fringes
Only dark bands
23
A spaceship of proper length
200 m
moves at
0.9c
. What is its observed length from Earth?
87 m
180 m
120 m
150 m
24
According to the law of reflection, the angle of incidence is always equal to the angle of ______.
Dispersion
Reflection
Refraction
Diffraction
25
Which factor
dominates
in GPS satellite time correction?
Earth’s magnetic field
Doppler shift
General relativity (weaker gravity, faster clocks)
Special relativity (motion, slower clocks)
