Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 194

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A $U$ -shaped wire is placed before a concave mirror having a radius of curvature $20 cm$ as shown in the figure. Find the total length of the image.

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Important Questions on Ray Optics

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 195

A short linear object $O$ is placed on the principal axis of convex mirror of focal length $f$ as shown in the figure. The ratio of transverse magnification to longitudinal magnification is :

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 196

An object is placed in front of a convex mirror. Which one of the following statements is correct?

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 197

A ray

P Q

incident on the refracting face

B A

is refracted in the prism

B A C

as shown in the figure and emerges from the other refracting face

A C

as

R S

such that

A Q = A R .

If the angle of prism

A = 60^{o}

and the refractive index of the material of prism is

\sqrt{3}

, then the angle of deviation of the ray is

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 198

A prism has a refracting angle of

60^{o} .

When placed in the position of minimum deviation, it produces a deviation of

30^{o} .

The angle of incidence is

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 199

The refractive index for the light of violet and red colour of any material are

1.66

and

1.64

respectively. If the angle of prism made of this material is

10 °

. Then angular dispersion is

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 200

If one face of prism is silvered having prism angle

30 °

and

μ = \sqrt{2}

. What will be the angle of incidence, so that the incident ray retraces its path?

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 201

A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and the latter is equal to

\frac{3}{4} th

of angle of prism. The angle of deviation is

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 202

If the refractive indices of a prism for red, yellow and violet colours be

1.61

,

1.63

and

1.65

respectively, then the dispersive power of the prism will be