(a) plane (b) concave (c) convex (d) either plane or convex Answer – The correct option is (d). The mirrors are likely to be either plane or convex. A virtual picture is formed by a plane mirror or...
Answer- The light ray bends in the direction of normal. When a light ray passes through an optically rarer medium (low refractive index) and enters an optically denser medium (high refractive...
Position of candle = 12.0 cm Position of convex lens = 50.0 cm Position of the screen = 88.0 cm What is the focal length of the convex lens?Where will the image be formed if he shifts the candle...
Power of lens Is the degree of convergence and divergence provided by a lens and its unit is Diopter (D). The focal length of the lens used by the first student is in positive so it is a convex...
Given, m = 1/3 Using = 1/v+1/u=1/f Calculating u, u = – 80 cm. The image is real and inverted so the mirror is concave.
Ray Diagram The image in the screen is real and so, the magnification is, m = –3 v = 80 cm u = ? m = v/u –3 = 80/u u = –80/3 cm As we know, 1/f = 1/v – 1/u =1/80 + 3/80 = 4/80 =...
(a) at infinity (b) at a finite distance from the mirror (a) (b)
(a) at the focus of the lens (b) between focus and twice the focal length of the lens (c) beyond twice the focal length of the lens (a) (b) (c)
The Laws of refraction: The Incident ray, refracted ray and the normal at the point of incidence lies in the same plane. The ratio of the sine of incidence and sine of refraction is same for the...
(a) between optical centre and focus of the lens (b) between focus and twice the focal length of the lens (c) at twice the focal length of the lens (d) at infinity (e) at the focus of the lens (a)...
(a) between pole and focus of the mirror (b) between focus and centre of curvature of the mirror (c) at the centre of curvature of the mirror (d) a little beyond the centre of curvature of the...
1. From air into water; 2. From water into air. 1. 2.
When two plane mirrors are placed perpendicular to each other, then the Incident ray and the reflected ray will always be parallel to each other.
The power of lens is inversely proportional to the focal length of the lens and the lens with focal length 20 has more power when compared to a lens with a focal length of 40 cm. The lens having...
Given, Absolute RI of diamond= 1.6 Absolute RI of glass= 1.5 Thus, Absolute refractive index of diamond = 2.4
To get a clear picture of the structure, Sudha has to move the screen and remove the lens. The length of the area will be about 15 cm. The light rays from a distant object such as a tree or a...
When an object is in F and F2 of a convex lens. So, we need to place the object between 20 and 40 cm of the lens. When an object is placed between F and 0 of a convex lens, its magnified, vertical...
The Refractive Index can be seen as a factor in reducing the speed and length of radiation in relation to vacuum values. w = civ where, n- Refractive index c – Speed of light v- Velocity The ratio...
The bending of light here is a reversal function. Reversal is based on refractive indices. The opposing indices of paraffin or turpentine will not be the same as water. So the degree of bending will...
When light ray penetrates into the denser medium from the abnormal bend to the normal In this case the magnitude of the curvature of the parallel radiation is the same. Thus, the emergent ray is...
1. Object is placed between the device and its focus, an image formed is enlarged and behind it. 2. Object is placed between the focus and device, an image formed is enlarged and on the same side as...
(a) Concave mirror only (b) Convex mirror only (c) Convex lens only (d) Concave mirror, convex mirror, concave lens and convex lens Answer: (d) Concave mirror, convex mirror, concave lens and convex...
(a) Plane, convex and concave (b) Convex, concave and plane (c) Concave, plane and convex (d) Convex, plane and concave Answer: (c) Concave, plane and convex Explanation: Concave mirror showed her...
(a) Kerosene (b) Water (c) Mustard oil (d) Glycerine Answer: (d) Glycerine Explanation: A ray of light incident obliquely at same angle would bend the most in glycerine media.
LRR PIC 6----- (a) Fig. A (b) Fig. B (c) Fig. C (d) Fig. D Answer: (d) Fig. D Explanation: The ray diagram in Figure D is correct for the ray of light incident on a concave mirror as the incident is...
(a) plane mirror only (b) concave mirror only (c) convex mirror only (d) all mirrors irrespective of their shape Answer: (d) all mirrors irrespective of their shape Explanation: The laws of...
(a) between the pole and the focus of the reflector (b) very near to the focus of the reflector (c) between the focus and centre of curvature of the reflector (d) at the centre of curvature of the...
(a) a concave mirror (b) a convex mirror (c) a plane mirror (d) both concave as well as plane mirror Answer: (b) a convex mirror Explanation: A full-length image of a distant tall building can...
(a) 15 cm in front of the mirror (b) 30 cm in front of the mirror (c) between 15 cm and 30 cm in front of the mirror (d) more than 30 cm in front of the mirror Answer: (d) more than 30 cm in front...
(a) is less than one (b) is more than one (c) is equal to one (d) can be more than or less than one depending upon the position of the object in front of it Answer: (a) is less than one Explanation:...
(a) A convex lens has 4 dioptre power having a focal length 0.25 m (b) A convex lens has –4 dioptre power having a focal length 0.25 m (c) A concave lens has 4 dioptre power having a focal length...
(a) A rectangular glass slab (b) A convex lens (c) A concave lens (d) A prism Answer: (a) A rectangular glass slab Explanation: When the beams of light are incident through the holes A and B and...
index of medium B relative to A will be (a) greater than unity (b) less than unity (c) equal to unity (d) zero Answer: (a) greater than unity Explanation: The refractive index is the bending of a...
medium B relative to medium A is (a) √3 / √2 (b) 2 / 3 (c) 1/ 2 (d) 2 Answer: (a) √3 / √2 Explanation: According to the Snell’s law, the refractive index of the medium B relative to the medium A is...
(a) Concave mirror as well as convex lens (b) Convex mirror as well as a concave lens (c) Two plane mirrors placed at 90° to each other (d) Concave mirror as well as a concave lens Answer: (d)...