If a concave lens have focal length of 15 cm and image distance is 10 cm then object distance is
A boy 1.8 m tall is standing 2.8 m in front of a camera which is using a convex lens having focal length of 0.04 m. image distance should be
When light travels in water or glass, its speed
If i is angle of incidence, r is angle of refraction and n is constant then sin i/sin r = n is known as
A girl 1.8 m tall is standing 2.8 m in front of a camera which is using a convex lens having focal length of 0.04 m. image is
Relationship between object distance (p), image distance (q) from mirror and focal length (f) of mirror is known as
A telescope that uses two converging lenses is called
A convex lens of focal length 8 cm is to be used to form a virtual image 2 times size of object. Where must lens be placed
An image of a statue appears to be 12.6 cm behind a concave mirror with focal length 14.5 cm. distance between mirror and statue is
A telescope can make stars look
If power of a convex lens is 5D then at what distance object should be placed from lens so that its real and 2 times larger image is formed
In fiber optic thread, refractive index of inner core is
Which of the following is correct mirror formula
