List of top Physics Questions on Spherical Mirrors

Distance between twice-magnified virtual image of an object placed in front of mirror is 15 cm. Find focal length of spherical mirror in cm.

Distance between virtual image, which is twice the size of object placed in front of mirror and object is 45 cm. The magnitude of focal length of the mirror is _____cm.

A convex lens of focal length $20\, cm$ is placed in front of convex mirror with principal axis coinciding each other The distance between the lens and mirror is $10\, cm$ A point object is placed on principal axis at a distance of $60 \, cm$ from the convex lens The image formed by combination coincides the object itself The focal length of the convex mirror is ________ $cm$

The radius of curvature of a spherical mirror is 16 cm. What is the focal length ?

Two vertical parallel mirrors A and B are separated by 10 cm. A point object O is placed at a distance of 2 cm from mirror A. The distance of the second nearest image behind mirror A from the mirror A is ___cm

If the focal length of a spherical mirror is 10 cm, what is the value of radius of curvature?

Which of the following is the formula for magnification in case of spherical mirror?

The refracting angle of prism is A and refractive index of material of prism is $\cot \frac{A}{2}$ The angle of minimum deviation is

A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:

A convex lens $'A'$ of focal length $20\, cm$ and a concave lens $'B'$ of focal length $5\, cm$ are kept along the same axis with a distance $'d'$ between them. If a parallel beam of light falling on $'A'$ leaves $'B'$ as a parallel beam, then the distance $'d'$ in cm will be :

Two thin biconvex lenses have focal lengths $f _{1}$ and $f _{2} .$ A third thin biconcave lens has focal length of $f_{3} .$ If the two biconvex lenses are in contact, the total power of the lenses is $P _{1}$. If the first convex lens is in contact with the third lens, the total power is $P _{2}$. If the second lens is in contact with the third lens, the total power is $P _{3}$ then

If the refractive index from air to glass is $\frac{3}{2}$ and that from air to water is $\frac{4}{3}$, then the ratio of focal lengths of a glass lens in water and in air is

In refraction, light waves are bent on passing from one medium to second medium because, in the second medium.

Which of the following is the formula for magnification of spherical mirror?

The relation between focal length and radius of curvature of a spherical mirror is

The following figure shows a beam of light converging at point \(P\). When a concave lens of focal length \(16 \,cm\) is introduced in the path of the beam at a place shown by dotted line such that \(OP\) becomes the axis of the lens, the beam converges at a distance \(x\) from the lens. The value of \(x\) will be equal to

A thin convex lens is made of two materials with refractive indices $n_1$ and $n_2$, as shown in figure. The radius of curvature of the left and right spherical surfaces are equal. / is the focal length of the lens when $n_1$ = $n_2$ = n. The focal length is $f+\Delta f$ when $n_1$ = n and $n_2 = n + \Delta n$. Assuming $\Delta n << (n ? 1)$ and $1 < n < 2$, the correct statement(s) is/are,

A man is looking his magnified image in a mirror placed in front of him. The kind of mirror he is using is ________

Two plano-concave lenses $(1$ and $2)$ of glass of refractive index $1.5$ have radii of curvature $25 \,cm$ and $20 \,cm$. They are placed in contact with their curved surface towards each other and the space between them is filled with liquid of refractive index $4/3$. Then the combination is

A student performed the experiment of determination of focal length of a concave mirror by u-v method using an optical bench of length 1.5 m. The focal length of the mirror used is 24 cm. The maximum error in the location of the image can be 0.2 cm. The 5 sets of (u, v)values recorded by the student (in cm) are : (42,56), (48,48), (60,40), (66, 33), (78, 39). The data set(s) that cannot come from experiment and is (are) incorrectly recorded, is (are)

A convex lens made of glass has focal length $0.15\, m$ in air. If the refractive index of glass is $3/2$, and that of water is $4/3$ the focal length of lens when immersed in water is

If in the following figure, height of object is $H_{1}=+2.5 \,cm$, then height of image $H_{2}$ formed is Concave mirror

The plane face of a plano-convex lens of focal length $20\, cm$ is silvered. What type of mirror will it become and of what focal length $ f $ ?

A container is filled with water ($\mu$ = 1.33) up to a height of 33.25 cm. A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25 cm below the water level. The focal length of the mirror is