Light Reflectio...

Which of the following formula is wrong in accordance with Snell's law ?

Refractive indices of water and glass are 4/3 and 3/2 respectively. A ray of light travelling in water is incident on the water-glass interface at $$30^0$$. Calculate the sine of angle of refraction.

An object is placed on the principal axis of a concave mirror at a distance of 60 cm. If the focal length of the concave mirror is 40 cm then determine the magnification of the obtained image.

You are given water, mustard oil, glycerine, and kerosene. In which of these media a ray of light is incident obliquely at same angle would bend the most ?

A pin that is 2 cm long is placed at a distance of 16 cm from a convex lens. Assuming it to be perpendicular to the principal axis, find the position of the image if the focal length of the lens is 12 cm.

A rod of length 10 cm lies along the principal axis of concave mirror of focal length 10 cm in such a way thatits end closer to the pole is 20 cm away from the mirror. The length of the image is then -

A concave mirror forms the real image of an object which is magnified 4 times. The object is moved 3 cm away, the magnification of the image is 3 times. What is the focal length of the mirror?

A convex mirror has a focal length of 20 cm. A real object is placed at a distance of 20 cm from the pole of the mirror and in front of the mirror. The mirror produces an image at :

The magnitude of focal length of a concave mirror is $$f$$. An object is placed at a distance $$x$$ from the focus and forms a real image. The magnification is:

What is the focal length of the convex lens ?