RAY OPTICS AND OPTICAL INSTRUMENTS - CBSE STD 12 Science Physics Questions

What is near point? State its value for a person with normal vision.

Obtain the equivalent focal length of combination of thin lenses placed in cantact.
$\left(\frac{1}{f}=\frac{1}{f_1}+\frac{1}{f_2}\right)$

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Q 32 Marks Questions2 Marks

Explain Cassegrain telescpoe with the help of figure.

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Q 42 Marks Questions2 Marks

A compound microscope consists of an objective lens of focal length 1 cm , an eyepiece of focal length 2 cm and tube length is 20 cm . Find its magnification.

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Q 52 Marks Questions2 Marks

Obtain the angular magnification for the image formed at infinity for simple microscope.

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Q 62 Marks Questions2 Marks

Explain simple microscope. Obtain the equation of magnification for the image formed at near point.

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Q 73 Marks Question3 Marks

Obtain the relationship between object distance $(u),$ image distance $(v)$ and focal length $(f)$ for a concave mirror.$\#\#\#$ Obtain $\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$ formula for a concave mirror.

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Q 83 Marks Question3 Marks

What are reflecting type of telescope ? Explain the advantages and disadvantages of reflecting telescopes as compared to refracting telescope and also give the solution.

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Q 93 Marks Question3 Marks

Explain two main important points for astronomical telescope.

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Q 103 Marks Question3 Marks

Explain the construction of refracting telescope by figure and obtain the equation of magnification.

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Q 113 Marks Question3 Marks

Explain the construction of compound microscope with the help of figure and derive the equation of magnification.

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Q 12Case study (4 Marks)4 Marks

Draw the graph of deviation angle $(\delta)$ versus incidence angle $(i)$ and derive the formula for refractive index $n_{21}=\frac{\sin \left(\frac{A+D_m}{2}\right)}{\sin \left(\frac{A}{2}\right)}$ for the material of prism.

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Q 13Case study (4 Marks)4 Marks

Explain the refraction by an equilateral prism and derive the formula $\delta=i+e- A$ in case of triangular prism of glass.

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Q 14Case study (4 Marks)4 Marks

Explain how the image is formed by thin convex lens and derive $-\frac{1}{u}+\frac{1}{v}=\left(n_{21}-1\right)\left[\frac{1}{R_1}-\frac{1}{ R _2}\right] \#\#\# $ Derive lens maker's formula for thin convex lens.

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Q 15Case study (4 Marks)4 Marks

Explain refraction at spherical surfaces and derive formula $-\frac{n_1}{n}+\frac{n_2}{v}=\frac{n_2-n_1}{ R }$.

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RAY OPTICS AND OPTICAL INSTRUMENTS question types

RAY OPTICS AND OPTICAL INSTRUMENTS questions

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RAY OPTICS AND OPTICAL INSTRUMENTS Physics - RAY OPTICS AND OPTICAL INSTRUMENTS

RAY OPTICS AND OPTICAL INSTRUMENTS question types

RAY OPTICS AND OPTICAL INSTRUMENTS questions

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