Ray Optics Practice Questions
JEE · Physics · 1476 free MCQs with instant results and detailed explanations.
1476
Total
361
Easy
644
Medium
471
Hard
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Topics in Ray Optics
Reflection
217
Refraction
221
TIR
202
Prism
196
Lenses
188
Optical Instruments
211
Aberrations
241
Sample Questions from Ray Optics
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the angle of reflection if a ray strikes a mirror at an angle of 30 degrees to the normal?
A.
30 degrees
B.
60 degrees
C.
45 degrees
D.
90 degrees
Show Answer & Explanation
Correct Answer: A
According to the law of reflection, the angle of reflection is equal to the angle of incidence.
Q2
Easy
A ray of light strikes a plane mirror with an incident angle of 45 degrees. What is the measure of the reflected angle?
A.
30 degrees
B.
45 degrees
C.
60 degrees
D.
75 degrees
Show Answer & Explanation
Correct Answer: B
The angle of reflection is equal to the angle of incidence, which is 45 degrees in this case.
Q3
Easy
Which of the following statements about reflection is incorrect?
A.
Reflection can occur at any angle.
B.
The angle of incidence equals the angle of reflection.
C.
Light reflects off a surface in a predictable manner.
D.
Reflection can only occur from smooth surfaces.
Show Answer & Explanation
Correct Answer: D
Reflection can also occur from rough surfaces, though the angles may vary and not be uniform.
Q4
Medium
A ray of light strikes a plane mirror at an angle of 30 degrees to the normal. What is the angle of reflection?
A.
30 degrees
B.
45 degrees
C.
60 degrees
D.
90 degrees
Show Answer & Explanation
Correct Answer: A
According to the law of reflection, the angle of incidence is equal to the angle of reflection.
Q5
Medium
Two plane mirrors are inclined to each other at an angle of 60 degrees. How many images of an object placed between them will be formed?
A.
5
B.
6
C.
7
D.
8
Show Answer & Explanation
Correct Answer: B
The number of images formed by two mirrors inclined at an angle θ is given by the formula: n = 360/θ - 1. Here, n = 360/60 - 1 = 6.
Q6
Medium
A light ray enters a glass block at an angle of incidence of 45 degrees. If the refractive index of glass is 1.5, what is the angle of refraction?
A.
30 degrees
B.
45 degrees
C.
60 degrees
D.
90 degrees
Show Answer & Explanation
Correct Answer: A
Using Snell's Law (n1 * sin(θ1) = n2 * sin(θ2)), we find the angle of refraction θ2 as arcsin(sin(45)/1.5).
Q7
Medium
A ray of light reflects off a surface and the angle of incidence is 40 degrees. What is the angle between the incident ray and the reflected ray?
A.
40 degrees
B.
80 degrees
C.
60 degrees
D.
20 degrees
Show Answer & Explanation
Correct Answer: B
The angle of incidence and the angle of reflection are equal. Thus, the angle between the two rays is 2 * 40 degrees = 80 degrees.
Q8
Hard
A ray of light makes an angle of 30° with the normal upon striking a reflective surface. What is the angle of reflection?
A.
30°
B.
60°
C.
45°
D.
90°
Show Answer & Explanation
Correct Answer: A
According to the law of reflection, the angle of incidence equals the angle of reflection. Therefore, the angle of reflection is also 30°.
Q9
Hard
A beam of light strikes a flat mirror at an angle of 45° to the normal and is reflected. What is the orientation of the reflected beam with respect to the horizontal surface?
A.
45°
B.
90°
C.
135°
D.
180°
Show Answer & Explanation
Correct Answer: A
The angle of reflection is equal to the angle of incidence. Since it strikes the mirror at 45°, the reflected beam also makes an angle of 45° with the normal, which is thus 45° with the horizontal surface.
Q10
Hard
A light ray reflecting off a surface follows the law of reflection. If the incident ray makes an angle of 60° with the horizontal, what is the angle between the reflected ray and the incident ray?
A.
60°
B.
120°
C.
150°
D.
180°
Show Answer & Explanation
Correct Answer: B
The angle of reflection is equal to the angle of incidence (60°). Thus, the angle between the incident and reflected rays is 60° + 60° = 120°.
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Ray Optics — JEE Physics Practice Questions Online
This page contains 1476 practice MCQs for the chapter Ray Optics in JEE Physics. The questions are organized by difficulty — 361 easy, 644 medium, 471 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 7 topics, giving you comprehensive coverage of the entire chapter.