Ray Optics Basics – Physics 2026

Ray Optics Basics is one of the most important and scoring chapters for Boards, JEE & NEET 2026. It builds the foundation for Wave Optics and Modern Physics.

At CHEMASH, we teach Ray Optics with detailed ray diagrams, derivations, and exam-oriented numericals in a low-budget, trusted tuition system for all classes.

Reflection of Light
Spherical Mirrors & Mirror Formula
Refraction & Snell’s Law
Thin Lens & Lens Formula
Magnification
Solved Numericals
MCQs
FAQs

1️⃣ Reflection of Light

Reflection occurs when light bounces back from a surface.

Laws of Reflection:

Angle of incidence = Angle of reflection
Incident ray, reflected ray and normal lie in same plane

2️⃣ Spherical Mirrors

Types:

Concave Mirror
Convex Mirror

Mirror Formula:

1/f = 1/v + 1/u

f = focal length
v = image distance
u = object distance

Important for Boards & JEE derivations.

3️⃣ Refraction of Light

Refraction occurs when light passes from one medium to another.

Snell’s Law:

n₁ sinθ₁ = n₂ sinθ₂

Refractive Index:

n = c / v

4️⃣ Thin Lens Formula

1/f = 1/v − 1/u

Types of lenses:

Convex (Converging)
Concave (Diverging)

5️⃣ Magnification

For mirrors:

m = -v/u

For lenses:

m = v/u

6️⃣ Solved Numerical

Q: An object is placed 20cm in front of concave mirror of focal length 10cm. Find image distance.

Using mirror formula:

1/f = 1/v + 1/u 1/10 = 1/v − 1/20 1/v = 1/10 + 1/20 = 3/20 v = 6.67 cm

7️⃣ MCQs (2026 Exam Oriented)

1. Refractive index of vacuum:
A) 0
B) 1 ✔
C) Infinity
D) 10

2. Convex mirror always forms:
A) Real image
B) Virtual image ✔
C) Enlarged image
D) Inverted image

FAQs

Is Ray Optics important for JEE 2026?
Yes. Mirror formula, lens formula and ray diagrams are frequently asked.

Does CHEMASH provide full problem-solving practice?
Yes. Weekly tests, doubt sessions and step-by-step explanation are provided.

Why Choose CHEMASH?

Low-budget tuition for all classes
Experienced and supportive teachers
Exam-focused preparation
Trusted Science brand
Weekly Physics mock tests

Master Ray Optics with CHEMASH and boost your Physics score in 2026.

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Ray Optics – Physics Classroom

Ray Optics Basics