Q1PhysicsUnit 16: Optics
When the distance between the object and the plane mirror increases:
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Optics Short Tricks for JEE
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Quick answer
Short tricks for Optics work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.
Use these Optics shortcuts to save time in JEE Physics papers — then validate speed with 210+ MCQs on Goodmarks.
Short tricks for speed
Optics focus drill
Solve 15 mixed MCQs for Optics, review every explanation, and note formulas you hesitated on.
Dimensional check first
Before solving, verify each term has consistent SI dimensions — eliminates wrong options quickly in JEE MCQs.
Limiting cases
Substitute extreme values (t→0, m→∞, θ→0) to sanity-check your final expression.
JEE Formula Sheet
6+ important formulas for Optics
Subtopics in Optics
- Reflection of light, spherical mirrors, mirror formula
- Refraction of light at plane and spherical surfaces, thin lens formula and lens maker formula
- Total internal reflection and its applications, magnification, power of a lens, combination of thin lenses in contact
- Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers
- Wave optics: wavefront and Huygens' Principle, laws of reflection and refraction using Huygens principle
- Interference: Young's double-slit experiment and expression for fringe width, coherent sources and sustained interference of light
- Diffraction due to a single slit, width of central maximum
- Polarization: plane-polarized light, Brewster's law, uses of plane-polarized light and Polaroid
View Optics formula sheet — 6+ JEE formulas
Free sample questions
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Q2PhysicsUnit 16: Optics
The distance between an electric lamp
and a screen is m. A convergent
lens of focal length is placed
between the lamp and the lens such
that a sharp image of the lamp
filaments is formed on the screen.
This question has multiple correct options
Q3PhysicsUnit 16: Optics
The observed wavelength of light
coming from a distant galaxy is found
to be increased by as compared
with that coming from a terrestrial
source. The galaxy is.
Q4PhysicsUnit 16: Optics
For a total internal reflection, which of
the following is correct?
Q5PhysicsUnit 16: Optics
A student focussed the image of a
candle flame on a white screen using a convex lens. He noted down the position of the candle screen and the lens as
under:
Position of candle
Position of convex lens
Position of the screen
What will be the nature of the image formed if he further shifts the candle
towards the lens?
Q6PhysicsUnit 16: Optics
Two coherent monochromatic light
beams of intensities and are
superposed. The maximum and minimum possible intensities in the resulting beam are:
Q7PhysicsUnit 16: Optics
Two independent monochromatic
sodium lamps can not produce interference because
Q8PhysicsUnit 16: Optics
When light waves suffers reflection at the interface from air to glass, the change in phase of reflected waves is
equal to
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Popular questions in Optics
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Frequently asked questions
Are short tricks enough for Optics in JEE?
No — tricks complement concepts. Master the theory first, then use shortcuts in timed MCQ practice.
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