Light: Reflection and Refraction

In mirrors, the distance of the virtual image from the pole is taken as __________.

Distance from the pole to the center of curvature is known as the __________.

A ray of light strikes a convex mirror parallel to the principal axis. After reflection, it appears to come from __________.

If the magnification produced by a mirror is $+1/3$, the mirror is __________.

A student is observing the image of a distant car in a convex rear-view mirror of a vehicle. As the car approaches the mirror and moves closer, which of the following correctly describes the change in the position and size of the car's image as seen in the mirror?

A student performs an experiment with a concave mirror having a focal length of $8\text{ cm}$. They place an object at a distance of $12\text{ cm}$ from the pole of the mirror. Following the logical steps shown in the diagram, calculate the image distance ($v$) and the magnification ($m$) produced.

A student observes that a spherical mirror forms a virtual image of an object placed $60\text{ cm}$ in front of it. The height of the image is $1/3$ the height of the object. Using the mirror formula and the logic in the flowchart, determine the focal length ($f$) of the mirror.

What is the magnification of an object placed at the center of curvature of a concave mirror?

A candle is placed $20\text{ cm}$ from a surface of a convex mirror. Its image is formed $12\text{ cm}$ from the mirror. If the candle is moved $4\text{ cm}$ towards the mirror, the shift in the image is:

An object $5\text{ cm}$ tall is placed $1\text{ m}$ from a concave mirror of radius $40\text{ cm}$. The size of the image is:

Refractive index of water with respect to air is 4/3. What is the refractive index of air with respect to water?

A ray of light traveling in air strikes a glass slab at an angle. The angle of refraction is always:

Atmospheric refraction causes the sun to be visible about:

If the refractive index of a medium is higher, light travels:

A ray of light is incident at the same non-zero angle $i$ onto a glass slab from two different surrounding media: first from air ($n = 1.00$), and then from water ($n = 1.33$). If the angles of refraction in the glass slab are $r_1$ for the air-to-glass case and $r_2$ for the water-to-glass case, which of the following relationships is correct?

If light travels from air to a medium of refractive index $1.5$, what is the percentage change in the speed of light?

Which of the following describes 'Optical Density'?

When a ray of light is incident at the interface of two media, if the refractive index of the second medium is exactly equal to the refractive index of the first medium, then:

A glass slab is composed of two layers of different glass types with refractive indices $n_1$ and $n_2$ and equal thickness $d$. What is the effective refractive index of the slab for light incident normally?

Which relationship correctly links the speed of light in air ($c$), the wavelength in air ($\lambda_a$), the speed in a medium ($v$), and the wavelength in the medium ($\lambda_m$)?

The distance between the optical center and the principal focus of a lens is known as the:

What is the power of a thick plane glass sheet?

If the magnification $m$ is positive, the image formed by the lens is:

If the magnification $m$ is negative, the image formed by the lens is:

For a lens, if the height of the object is $h$ and the height of the image is $h'$, then magnification $m$ is:

The focal length of a convex lens is $10\text{ cm}$. At what distance from the lens should an object be placed so that it forms a real image of the same size?

When the object is placed at infinity for a convex lens, the image is formed at:

A thin lens of focal length $f$ and aperture diameter $d$ forms an image of intensity $I$. If the central part of the aperture up to diameter $d/2$ is blocked by an opaque paper, the new intensity will be:

An object is placed at a distance of $f/2$ from a convex lens of focal length $f$. The magnification produced is:

A convex lens of focal length $f$ is cut into two halves along a line perpendicular to the principal axis. The focal length of each half is:

The property of light by which it travels in a straight line is called:

A ray of light falling normally (perpendicularly) on a plane mirror reflects back:

Which of the following is NOT a law of reflection?

Refractive index of water with respect to air is $1.33$. What does this indicate?

An object of height $4\text{ cm}$ is placed at a distance of $30\text{ cm}$ from a concave mirror having a focal length of $20\text{ cm}$. Following the Cartesian sign convention, what will be the height of the image formed?

A ray of light passes from medium X to medium Y. If the angle of incidence in medium X is $45^{\circ}$ and the angle of refraction in medium Y is $30^{\circ}$, what is the refractive index of medium Y with respect to medium X?

A ray of light starting from air passes through medium A, then medium B, and finally enters medium C. If the refractive indices are $n_A = 1.33$, $n_B = 1.50$, and $n_C = 1.65$, in which medium will the light ray bend most towards the normal relative to the previous medium?

A convex lens $L_1$ of focal length $20$ cm and a concave lens $L_2$ of focal length $10$ cm are placed coaxially at a distance of $10$ cm from each other. A parallel beam of light is incident on the lens $L_1$. After passing through the second lens $L_2$, the emergent beam of light will:

A ray of light is incident on a plane mirror at an angle of $30^\circ$ with the mirror surface. The angle of deviation is:

The magnification of a mirror is given by $m = f / (f-u)$. For a convex mirror, if the object is moved away from the mirror, the magnification:

The reflecting surface of a convex mirror curves:

When an object is placed at the center of curvature of a concave mirror, the magnification is:

Which of the following is NOT a property of an image formed by a plane mirror?

Distances measured in the direction of the incident light are taken as:

According to the New Cartesian Sign Convention, if an object is placed in front of a spherical mirror and it forms a virtual and erect image, which of the following is true regarding the signs of the object height ($h$) and image height ($h'$)?

Consider a spherical mirror where the magnification ($m$) is always positive and its value is always less than $1$ ($0 < m < 1$) for any real object. Which type of mirror is this, and what is the nature of the image formed?

A student conducts an experiment with a concave mirror and finds that the distance from the pole to the point where parallel rays of light converge after reflection is $15\text{ cm}$. What is the distance between the principal focus and the center of curvature for this mirror?

What happens to the focal length of a spherical mirror if it is cut horizontally into two equal halves along the principal axis?

A ray of light is incident on a convex mirror parallel to the principal axis. The reflected ray, when produced backwards, passes through:

A student conducts an experiment with a concave mirror and finds that for a certain object distance, the image distance is equal to the object distance. This distance is equal to:

The principal focus of a concave mirror is the point where rays parallel to the axis:

When an object is placed beyond $C$ of a concave mirror, the image is formed:

Which mirror is used in torches, search-lights and vehicle headlights to get powerful parallel beams of light?

If $R = 2f$ for a mirror, then $f$ for a mirror with $R = 50\text{ cm}$ is:

In the context of a convex mirror, a ray of light is incident such that it is directed towards the virtual principal focus ($F$) as shown in the diagram. What is the specific path taken by the reflected ray?

A student places an object 40 cm away from a concave mirror with a focal length of 15 cm. Which of the following correctly describes the sequence of the Pole ($P$), Focus ($F$), Image ($I$), and Center of Curvature ($C$) along the principal axis, starting from the mirror?

A ray of light is incident on a convex mirror such that its direction, if extended behind the mirror, passes through the center of curvature ($C$). According to the laws of reflection for spherical mirrors, how will this ray behave after reflection?

What happens to the focal length of a concave mirror when it is moved from air to a medium with a refractive index less than that of the mirror's glass?

If $R$ is the radius of curvature of a spherical mirror, then the relationship $f = R/2$ is strictly valid only for:

A virtual image is formed by a concave mirror. Which of the following is true about the position of the object?

The ability of a lens to converge or diverge light rays depends on its:

A real image is formed by a convex lens when the object is placed:

If the refractive index of medium 2 with respect to medium 1 is $n_{21}$, then $n_{21}$ is:

Which of the following is true for a concave lens?

The absolute refractive indices of four liquids A, B, C, and D are $1.33$, $1.50$, $1.44$, and $1.65$ respectively. If light travels between these liquids, in which of the following transitions will the ray of light bend away from the normal to the greatest extent?

A ray of light passes through three transparent media P, Q, and R in sequence. The speed of light in these media is $v_P$, $v_Q$, and $v_R$ respectively. If the refractive index of Q with respect to P ($n_{QP}$) is $1.2$ and the refractive index of R with respect to Q ($n_{RQ}$) is $0.8$, which of the following is the correct relationship between the speeds of light in these media?

What is the magnification of a lens if the object is $2$ cm high and the image is $6$ cm high and erect?

A ray of light travels through a stack of four different transparent media $M_1, M_2, M_3,$ and $M_4$ having parallel boundaries. Based on the angles made by the ray with the normal in each medium as shown in the diagram, which of the following represents the correct increasing order of the refractive indices ($n$) of these media?

A ray of light incident on a glass slab at $30^{\circ}$ suffers a lateral shift $S$. If the angle of incidence is increased to $45^{\circ}$, the lateral shift will:

The linear magnification of a concave lens is always: