Light - Reflection and Refraction
CBSE Class 10 Science · 96 board questions from this chapter; 94 listed below, 2023–2026
- A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position…2026
- Rays from the sun converge at a point 25 cm behind a convex lens. The distance at which an object be placed in front of the lens…2026
- From the following options choose the one which gives negative magnification greater than one:2026
- With the help of above given ray diagram, calculate the angle of refraction. Given that the refractive index of Medium 2 with…2026
- Define absolute refractive index of an optical medium. Arrange these material mediums given in the table in increasing order of…2026
- Draw the ray diagram showing refraction through a glass slab and write the relation between angle of incidence, angle of…2026
- Use the above given ray diagram to calculate the angle of incidence. Given that the refractive index of Medium 2 with respect to…2026
- Relate the speed of light in the given medium with its optical density. Using the information given in the table below, arrange…2026
- A ray of light enters into medium B from medium A as shown in the given figure: Which one of these two media is optically denser…2026
- The given figure shows image formation by a lens. Analyse the figure and answer the following questions: What is the type of lens…2026
- Draw the ray diagram for the image formation by a lens which shows a magnification of +2.2026
- With the help of the given ray diagram, calculate the refractive index of Medium 2 with respect to Medium 1. (Given that √3=1 ·…2026
- When an incident ray of light enters in a medium 'X' from medium 'Y', it bends away from the normal. Comment about the following:…2026
- A mirror always forms a virtual, erect and diminished image. Identify the mirror and draw a labelled ray diagram for image…2026
- Redraw the following ray diagrams in your answer book and show the path of reflected/refracted ray:2026
- Write the name of the lens and position of the object in front of it so that a virtual and magnified image is formed. An object…2026
- Observe the given ray diagram and compare: (i) the speed of light in medium A and the speed of light in medium B. (ii) the…2026
- Write the expression for the magnification produced by a lens in terms of object distance and image distance. A 4 cm tall object…2026
- State the laws which help to find out the angle of incidence and angle of reflection in the ray diagram given above. Find out the…2026
- A ray of light after reflection from a concave mirror becomes parallel to its principal axis. Draw a labelled ray diagram to show…2026
- An object of height 6 cm is placed at a distance of 30 cm from the optical centre of a concave lens of focal length 15 cm. Use…2026
- An object is placed at a distance of 30 cm in front of a convex lens of focal length 15 cm. Use lens formula to determine the…2026
- A mirror used for rear-view of an automobile has a focal length 2.0 m. If a car is located at 8.0 m from the mirror - Find out…2026
- The above ray diagram is to show image formation by a reflecting telescope. Reflecting telescope revolutionized our way of…2026
- Read the following passage and answer the questions given: Lenses can form different types of images depending upon their focal…2026
- The variation of image distance (v) with the object distance (u) for a convex lens is given in the following observation table.…2026
- To get an image of magnification -1 on a screen using a lens of focal length 20 cm, the object distance must be:2025
- If the absolute refractive indices of two media X and Y are 6/5 and 4/3 respectively, then the refractive index of Y with respect…2025
- An optical device 'X' is placed obliquely in the path of a narrow parallel beam of light. If the emergent beam gets displaced…2025
- An object is placed at a distance of 30 cm from the pole of a concave mirror. If its real and inverted image is formed at 60 cm…2025
- In order to obtain large images of the teeth of patients, the dentist holds the concave mirror in such a manner that the teeth…2025
- Identify from the following the ray diagram which shows the correct path of the reflected ray for the ray incident on a concave…2025
- Mirror 'X' is used to concentrate sunlight in solar furnace and Mirror 'Y' is fitted on the side of the vehicle to see the…2025
- In the given figure the angle of incidence and the angle of deviation respectively are:2025
- Consider the following ray diagram: Here, the angle of incidence and angle of deviation respectively are2025
- An object is placed at a distance of 10 cm in front of a concave mirror of focal length 15 cm. Use mirror formula to determine…2025
- During an experiment, a student observes that the given mirror is forming an erect and diminished image for all positions of the…2025
- When an incident ray of light enters a medium 'X' from air, it bends towards the normal. Infer about the following with respect…2025
- An object is placed at a distance of 30 cm in front of a concave mirror of focal length 20 cm. Use mirror formula to determine…2025
- An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. Use lens formula to find the position of…2025
- Study the figure in which the path of a ray of light going from Medium 1 to Medium 2 is shown. Out of the two Media - Medium 1…2025
- The values of absolute refractive indices of kerosene and water are 1.44 and 1.33 respectively. Compare the two media on the…2025
- Out of the two lenses, one concave and the other convex, state which one will diverge a parallel beam of light falling on it.…2025
- An object of size 5 cm is placed at a distance of 30 cm from the optical centre of a converging lens of focal length 20 cm. Use…2025
- Draw ray diagrams to show the nature, position and relative size of the image formed by a convex mirror when the object is placed…2025
- If we want to obtain a real and magnified image of an object by using a concave mirror of focal length 18 cm. Where should the…2025
- If we want to obtain a virtual and magnified image of an object by using a concave mirror of focal length 18 cm, where should the…2025
- The power of a lens is -0.25 D. Based on this information, find out The type of lens and its focal length. The eye defect for…2025
- A convex lens forms an 8.0 cm long image of a 2.0 cm long object which is kept at a distance of 6.0 cm from the optical centre of…2025
- An object is placed at a distance of 20 cm from the optical centre of a concave lens and its image is formed on the same side of…2025
- A convex mirror used for rear view on an automobile has a focal length of 1.5 m. If a 3 m high bus is located at 6.0 m from the…2025
- A student placed a candle flame at different distances from a convex lens and focused its image on a screen. He recorded his…2025
- (i) "In refraction of light through a rectangular glass slab, the emergent ray is always parallel to the direction of the…2025
- Observe the following diagram and compare (i) speed of light and (ii) optical densities of the three media A, B and C. Also give…2025
- (i) The power of a lens 'X' is -2•5 D. Name the lens and determine its focal length in cm. For which eye defect of vision will an…2025
- Absolute refractive index of glass and water is 3/2 and 4/3 respectively. If the speed of light in glass is 2 × 10^8 m / s, the…2024
- How will the image formed by a convex lens be affected, if the upper half of the lens is wrapped with a black paper?2024
- At what distance from a convex lens should an object be placed to get an image of the same size as that of the object on a screen?2024
- The speed of light in vacuum is 3 × 10^8 m / s. If the speed of light in a medium is 2.25 × 10^8 m / s, the absolute refractive…2024
- A ray of light falls making an angle of incidence θ on the surface of a glass slab. Draw a labelled ray diagram to show its path.…2024
- An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position of the image formed by…2024
- State two laws of refraction of light. OR Define the term absolute refractive index of a medium. A ray of light enters from…2024
- Define power of a lens. Find power of a lens whose focal length is 50 cm.2024
- The heat produced at a point due to concentration of sunlight by a convex lens burns a paper. Explain why it happens. Name the…2024
- "The linear magnification produced by a spherical mirror is + 3." Based on this statement answer the following questions: What is…2024
- An object is placed in front of a concave mirror of focal length 12 cm. If distance of the object from the pole of the mirror is…2024
- (i) State laws of reflection of light. (ii) An object of height 5⋅0 cm is placed at 15 cm in front of a concave mirror of focal…2024
- (i) Draw a ray diagram to show the path of the refracted ray in each of the following cases: A ray of light incident on a concave…2024
- Upper half of a convex lens is covered with a black paper. Draw a ray diagram to show the formation of image of an object placed…2024
- The variation of image distance (v) with object distance (u) for a convex lens is given in the following observation table.…2024
- A highly polished surface such as a mirror reflects most of the light falling on it. In our daily life we use two types of…2024
- Study the data given below showing the focal length of three concave mirrors A, B and C and the respective distances of objects…2024
- A student wants to obtain an erect image of an object using a concave mirror of 10 cm focal length. What will be the distance of…2023
- To obtain a magnification of + 2 with a concave mirror of radius of curvature 60 cm the object distance must be2023
- In torch lights and head lights of vehicles, the bulb is placed2023
- An object is placed in front of a convex mirror at infinity. According to the New Cartesian Sign Convention, the sign of the…2023
- A light ray enters from medium A to medium B as shown in the figure. Which one of the two media is denser w.r.t. other medium?…2023
- A student wants to project the image of a candle flame on a screen 60 cm in front of a mirror by keeping the candle at a distance…2023
- The magnification produced when an object is placed at a distance of 20 cm from a spherical mirror is+1/2. Where should the…2023
- A student has focussed the image of an object of height 3 cm on a white screen using a concave mirror of focal length 12 cm. If…2023
- An object is kept at a distance of 1m from a lens of power+2D: (i) Identify the type of lens. (ii) Calculate its focal length and…2023
- Complete the following ray diagram to show the formation of image: Mention the nature, position and size of the image formed in…2023
- Define the following terms in the context of a diverging mirror: (i) Principal focus (ii) Focal length Draw a labelled ray…2023
- (i) An object of 5 cm height is placed at a distance of 20 cm from the optical centre of a concave lens of focal length 18 cm.…2023
- The image of an object formed by a lens is of same size but inverted. If the object distance is 30 cm, calculate (i) The distance…2023
- The power of a lens is+4D. Find the focal length of this lens. An object is placed at a distance of 50 cm from the optical centre…2023
- A student has focussed the image of an object of height 3 cm on a white screen using a concave mirror of focal length 12 cm. If…2023
- Draw a ray diagram for showing the convergence of a parallel beam of light by a concave mirror and mark the positions of pole and…2023
- An object is placed in front of a convex lens of focal length f. If the distance of the object from the lens is 2f, draw a ray…2023
- Name the type of mirror that should be used to obtain the following types of images: (i) A magnified and virtual image of an…2023
- The ability of a medium to refract light is expressed in terms of its optical density. Optical density has a definite…2023
- Many optical instruments consist of a number of lenses. They are combined to increase the magnification and sharpness of the…2023
- A student took three concave mirrors of different focal lengths and performed the experiment to see the image formation by…2023
- Hold a concave mirror in your hand and direct its reflecting surface towards the sun. Direct the light reflected by the mirror on…2023
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