Ray Optics and ...

The focal length of a concave mirror is $$50\ cm.$$ Where an object be placed so that its image is two times and inverted

The critical angle between an equilateral prism and air is $$45^{o}$$. If the incident ray is perpendicular to the refracting surface, then

Two parallel pillars are $$11\ km$$ away from an observer. The minimum distance between the pillars so that they can be seen separately will be 

If the speed of light in vacuum is $$C\ \ m/sec$$, then the velocity of light in a medium of refractive index $$1.5$$ is

On a glass plate a light wave is incident at an angle of $$60^o$$. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is

A ray of light strikes a plane mirror $$M$$ at an angle of $$45^o$$ as shown in the figure. After reflection, the ray passes through a prism of refractive index $4\$1.5$$ whose apex angle is $$4^o$$. The total angle through which the ray is deviated is

The image distance of an object placed $$10\ cm%$$ in front of a thin lens of focal length $$5cm$$ is

A prism $$(\mu=1.5)$$ has the refracting angle of $$30^{o}$$. The deviation of a monochromatic ray incident normally on its one surface will be $$(\sin 48^{o}36=0.75)$$

Absolute refractive indices of glass and water are $$\dfrac {3}{2}$$ and $$\dfrac {4}{3}$$. The ratio of velocity of light in glass and water will be

The graph between the lateral magnification $$(m)$$ produced by a lens and the distance of the image $$(v)$$ is given by