A ray of light passes from glass, having a refractive index of 1.6, to air. The angle of incidence for which the angle of refraction is twice the angle of incidence is
A man is walking under an inclined mirror at a constant velocity V ms–1along the X-axis. If the mirror is inclined at an angle θ with the horizontal, then what is the velocity of the image?
Figure shows the graph of angle of deviation δ versus angle of incidence ifor a light ray striking a prism. The prism angle is
Light is incident on a glass block as shown in fig. If θ1 is increased slightly, what happens to θ2?
A thin equiconvex lens (μ = 3/2) of focal length 10 cm is cut and separated and a material of refractive index 3 is filled between them. What is the focal length of the combination?
Behind a thin converging lens having both the surfaces of the same radius 1 cm, a plane mirror has been placed. The image of an object at a distance of 40 cm from the lens is formed at the same position. What is the refractive index of the lens?
What should be the value of distance d so that final image is formed on the object itself. (Focal lengths of the lenses are written on the lenses).
A car fitted with a convex mirror of focal length 20 cm. A second car 2 m broad and 1.6 m high is 6 m away from the first car. The position of the second car as seen in the mirror of the first car is
In the above question, the breadth and height of the second car seen in the mirror of the first car are, respectively,
In the above question, if the second car is overtaking at a relative speed of 314 ms–1, how fast will the image be moving?
Consider an equiconvex lens of radius of curvature R and focal length f. Iff > R, the refractive index μ of the material of the lens