Vanya is trying to understand how light bends when it passes through different materials. The equation to calculate the refractive index is ______.
Optics-2

Quiz
•
Physics
•
11th Grade
•
Hard
Surendar Rawat
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
n or μ = c/v
rμ = l/m
i = v/l
μ = v/m
Answer explanation
The correct equation for calculating the refractive index (n or μ) is n or μ = c/v, where c is the speed of light in a vacuum and v is the speed of light in the material. This relationship shows how light bends in different media.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Siya is conducting an experiment to compare the speed of light in different mediums. If the absolute refractive indices of water and glass are 4/3 and 3/2, respectively, then what will be the ratio of velocity of light in water to that in glass?
2
8/9
9/8
1/2
Answer explanation
The speed of light in a medium is inversely proportional to its refractive index. For water (n=4/3) and glass (n=3/2), the ratio of velocities is (c/n_water) / (c/n_glass) = (3/4) / (2/3) = 8/9. Thus, the correct answer is 8/9.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Aarush is observing a light beam as it travels from water to air. He wonders when total internal reflection occurs in this scenario. It happens when _______________________________________.
light passes from a denser to a rarer medium
light comes into air from vacuum
light goes to vacuum from air
light passes from rarer to denser medium
Answer explanation
Total internal reflection occurs when light passes from a denser medium (like water) to a rarer medium (like air). This is because the angle of incidence must exceed the critical angle for reflection to happen.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Eshaan was experimenting with light in his physics class. He learned that for light to travel from an optically denser medium into an optically rarer medium, certain conditions must be met. Specifically, the angle of incidence in the denser medium should be greater than the critical angle for a given pair of media. What principle does this represent?
Snell's law of reflection
Snell's law of refraction
Condition of total internal reflection
None of the above
Answer explanation
The scenario describes total internal reflection, which occurs when light travels from a denser to a rarer medium at an angle greater than the critical angle, preventing refraction and reflecting all light back into the denser medium.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Naira was observing a beautiful sunset when she noticed a shimmering effect on the horizon. She wondered, what is this phenomenon called?
refraction of light only
total internal, reflection of light only
refraction and total internal reflection of light
dispersion of light only
Answer explanation
The shimmering effect Naira observed is due to both refraction and total internal reflection of light, which occur when light passes through different mediums, creating beautiful visual phenomena during sunsets.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Anika is conducting an experiment with light and discovers that the critical angle is the angle at which the angle of refraction is ______.
0°
90°
180°
45°
Answer explanation
The critical angle is defined as the angle of incidence at which the angle of refraction is 90°. At this angle, light refracts along the boundary, leading to total internal reflection for angles greater than the critical angle.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
During a physics experiment, Aarav observed that at the critical angle, the ray instead of being ____________ is totally _______________ back in a denser medium.
refracted, reflected
reflected, refracted
absorbed, reflected
absorbed, refracted
Answer explanation
At the critical angle, the ray cannot pass into the less dense medium and is instead totally reflected back. Therefore, the correct completion is 'refracted, reflected'.
Create a free account and access millions of resources
Similar Resources on Quizizz
20 questions
Wave Phenomena

Quiz
•
11th - 12th Grade
25 questions
Wave Optics

Quiz
•
University
20 questions
Geometric Optics

Quiz
•
University
20 questions
Ray Model of Light

Quiz
•
10th - 12th Grade
23 questions
Reflection Refraction and Wavelength

Quiz
•
10th - 12th Grade
20 questions
Em waves

Quiz
•
12th Grade
20 questions
Light

Quiz
•
10th - 12th Grade
29 questions
Snell's Law Quiz

Quiz
•
9th Grade - University
Popular Resources on Quizizz
15 questions
Multiplication Facts

Quiz
•
4th Grade
25 questions
SS Combined Advisory Quiz

Quiz
•
6th - 8th Grade
40 questions
Week 4 Student In Class Practice Set

Quiz
•
9th - 12th Grade
40 questions
SOL: ILE DNA Tech, Gen, Evol 2025

Quiz
•
9th - 12th Grade
20 questions
NC Universities (R2H)

Quiz
•
9th - 12th Grade
15 questions
June Review Quiz

Quiz
•
Professional Development
20 questions
Congruent and Similar Triangles

Quiz
•
8th Grade
25 questions
Triangle Inequalities

Quiz
•
10th - 12th Grade
Discover more resources for Physics
40 questions
Week 4 Student In Class Practice Set

Quiz
•
9th - 12th Grade
40 questions
SOL: ILE DNA Tech, Gen, Evol 2025

Quiz
•
9th - 12th Grade
20 questions
NC Universities (R2H)

Quiz
•
9th - 12th Grade
25 questions
Triangle Inequalities

Quiz
•
10th - 12th Grade
10 questions
Right Triangles: Pythagorean Theorem and Trig

Quiz
•
11th Grade
65 questions
MegaQuiz v2 2025

Quiz
•
9th - 12th Grade
10 questions
GPA Lesson

Lesson
•
9th - 12th Grade
15 questions
SMART Goals

Quiz
•
8th - 12th Grade