List of top Physics Questions on Ray optics and optical instruments asked in TS EAMCET

A point object is at rest on the principal axis at a distance of 20 cm from a concave mirror of radius of curvature 30 cm. Under the action of a horizontal force, the object moves away from the mirror along the axis and reaches a distance of 40 cm from the mirror in a time of 3 s. The acceleration of the image is:
The ratio of the speeds of light in a prism P and in vacuum is \(1:\sqrt3\) and the angle of minimum deviation is \(60^\circ\). In another prism Q of same angle of prism, if the angle of minimum deviation is \(30^\circ\), then the refractive index of the material of prism Q is:
A point object moves towards a concave mirror (f = 20 cm) at 4 cm/s. Find speed of image when object is at 60 cm.
Focal lengths of objective = 20 m and eyepiece = 1 cm. Find angular magnification of telescope.
When an equilateral prism is immersed in a liquid A of refractive index $\frac{4}{3}$ the angle of minimum deviation is equal to the angle of the prism. If the same prism is immersed in another liquid B, the angle of minimum deviation is 50% of the angle of the prism, then the refractive index of the liquid B is}
A thin convex lens forms a virtual image when an object is placed on the principal axis at a distance of 12 cm from the lens. When the object is moved away from the lens along the principal axis through a distance of 18 cm, the lens forms a real image. If the magnification of the virtual image is five times the magnification of the real image, then the focal length of the lens is
When a thin convex lens is immersed in a liquid of refractive index $1.2$, the focal length of the lens becomes $48\text{ cm}$. If the ratio of the radii of curvature of the lens is $2:3$ and the refractive index of the material of the lens is $1.5$, then the radii of curvature of the lens are:
Angle of minimum deviation for a prism --- the ray inside the prism:
A ray of light incidents at an angle of $9.3^\circ$ on one face of a small angle prism of refracting angle $6^\circ$. If the ray of light emerges normally from the second face, the refractive index of the material of the prism is
A straight metal rod of length 6 cm is placed along the principal axis of a concave mirror of focal length 9 cm such that the end of the rod closer to the mirror is at a distance of 15 cm from the pole of the mirror. The length of the image of the rod is
A convex lens of radii of curvature 6 cm and 12 cm is immersed in a liquid of refractive index 1.3. If the refractive index of the material of the lens is 1.5, then the focal length of the lens when immersed in the liquid is
A Cassegrain telescope uses two mirrors of radii of curvature 25 cm and 16 cm separated by a distance of 2.5 cm. The position of the final image of an object at infinity is
A convex lens made of glass of refractive index 1.5 is immersed in a liquid. If the focal length of the lens when immersed in the liquid is twice its focal length when it is in air, then the refractive index of the liquid is
A ray of light is travelling from a medium of refractive index 1.414 to air. If the angle of incidence is $48^{\circ}$, then the angle of deviation of the light ray is
In the experiment of a convex lens, if the distance between the object and its real image is 90 cm and the magnification produced by the lens is 2, then the focal length of the convex lens is
A layer of oil of thickness 5.8 cm is floating on a water layer of thickness 8 cm. If the total apparent depth is 10 cm and the refractive index of water is 3/4, then the refractive index of oil is
The distance between the objective and eyepiece of an astronomical telescope when the final image forms at infinity is 62 cm. If the magnification of the telescope is 30, the focal lengths of the objective and eyepiece respectively are:
A convex lens produces clear images when placed at two positions between an object and a screen that are 1 m apart. If the distance between the two positions of the lens at which clear images are formed is 20 cm, the focal length of the lens is:
Monochromatic light of wavelength 6000 Å incidents on a small angled prism. If the angle of the prism is 6°, the refractive indices of the material of the prism for violet and red lights are respectively 1.52 and 1.48, then the angle of dispersion produced for this incident light is
An object of height 3.6 cm is placed normally on the principal axis of a concave mirror of radius of curvature 30 cm. If the object is at a distance of 10 cm from the principal focus of the mirror, then the height of the real image formed due to the mirror is