A point source of light is placed at the bottom of a tank filled with water (refractive index = 4/3) to a height of 1 m. What is the area of the surface of water through which light emerges?

A biconvex lens has radii of curvature 20 cm each. If the refractive index of the lens material is 1.5, what is the power of the lens?

The near point of a hypermetropic person is 75 cm from the eye. What is the power of the lens required to enable them to read a book placed at 25 cm?

A ray of light is incident at an angle of incidence 'i' on one surface of a prism of angle A. If the angle of emergence is equal to 'i', the angle of minimum deviation is:

A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm. If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens?

What is the minimum angle of deviation for a prism of refractive index √2 and refracting angle 60°?

Two thin lenses of focal lengths f1 and f2 are placed in contact. What is the effective focal length of the combination?

If a light ray travels from a rarer medium to a denser medium, what happens to its speed and wavelength?

What is the relationship between the object distance (u), image distance (v), and focal length (f) of a spherical mirror?

A concave mirror forms a real image of an object placed at a distance of 20 cm from it. If the image is three times the size of the object, what is the focal length of the mirror?