In a white light spectrum produced by dispersion of light through a prism the ray that is deviated least is :
- Ayellow
- Bblue
- Cgreen
- ✓red
Answer: D.
View full solution →Question types
Ray Optics and Optical Instruments question types
65 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
65
Questions
6
Question groups
5
Question types
01
M.C.Q (1 Marks)
43 Q→021 Marks Question
1 Q→032 Marks Questions
4 Q→043 Marks Question
5 Q→054 Marks Questions
4 Q→065 Marks Questions
8 Q→Sample Questions
Ray Optics and Optical Instruments questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
The resolving power of a telescope can be increased by increasing :
- AWavelength of light
- ✓Diameter of objective
- CLength of the tube
- DFocal length of eyepiece
Answer: B.
View full solution →A biconvex lens of glass having refractive index 1.47 is immersed in a liquid. It becomes invisible and behaves as a plane glass plate. The refractive index of the liquid is :
- ✓1.47
- B1.62
- C1.33
- D1.51
Answer: A.
View full solution →The colour of sky is blue due to :
- Ainterference
- ✓scattering
- Cdiffraction
- Dpolarisation
Answer: B.
View full solution →Image formed in compound microscope is :
- Areal and erect
- ✓real and inverted
- Cvirtual and inverted
- Dvirtual and erect
Answer: B.
View full solution →What is critical angle ? Write down its necessary conditions.
Differentiate between primary rainbow and secondary rainbow.
Draw the ray diagram of an astronomical telescope showing image formation in the normal adjustment position. Write the expression for its magnifying power.
Draw a labelled ray diagram to show image formation by a compound microscope and write the expression for its resolving power.
Two thin lenses of powers 5D and 2D are placed coaxially at a distance 20 cm apart. Find the focal length and power of the combination of lenses.
Explain polarisation of light.
Establish the relation between critical angle and refractive index.
Draw a ray diagram for the image formation of an point object placed on the principal axis of the convex lens when the object is placed at a distance equal to three times of the focal length of the lens.
What is total internal reflection ?
Define critical angle and write the conditions of total internal reflection.
Establish the formula : $\frac{n_{2}}{v}-\frac{n_{1}}{u}=\frac{n_{2}-n_{1}}{R}$ for refraction at single curved surface, where symbols have their usual meanings.
View full solution →What is the difference between Magnification and Magnifying power ?
(a) What do you mean by equivalent lens? In a system of two lenses these are placed at a some distance from each other. Establish the formula for the equivalent focal length of the system.
(b) A lens converted by two curved surfaces of radius of curvature R1 and R2 is placed according to the following figure :
Prove that: $\frac{n_3}{v}-\frac{n_1}{u}=\frac{n_2-n_1}{R_1}+\frac{n_3-n_2}{R_2}$
View full solution →(b) A lens converted by two curved surfaces of radius of curvature R1 and R2 is placed according to the following figure :
Prove that: $\frac{n_3}{v}-\frac{n_1}{u}=\frac{n_2-n_1}{R_1}+\frac{n_3-n_2}{R_2}$
Draw a neat labelled diagram of human eye. Explain shortsightedness and longsightedness eye defects giving their cause and method of removal showing ray diagram.
Mention the defects of human vision and describe the method to remove them.
Establish the formula for the equivalent focal length of the combination of two thin lenses placed in contact.
Explain with a neat diagram construction and working of a compound microscope. Obtain an expression for its magnifying power.
Write the formula for refraction of light at spherical surface (concave or convex). With the help of this formula derive the lens formula : $\frac{1}{f}=(n-1)(\frac{1}{R_{1}}-\frac{1}{R_{2}})$, where symbols used have their usual meanings.
View full solution →Draw a graph between angle of deviation '$\delta$' and angle of incidence i for a prism showing the variation of $\delta$ with i.
Show for a prism that the refractive index n is given by :
$n=\frac{\sin \left[\left(\frac{A+\delta_m}{2}\right)\right]}{\sin (A / 2)}$
where symbols have their usual meanings.
View full solution →Show for a prism that the refractive index n is given by :
$n=\frac{\sin \left[\left(\frac{A+\delta_m}{2}\right)\right]}{\sin (A / 2)}$
where symbols have their usual meanings.
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