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Question 1 Define optical centre? Question 2 Define principal focus? Question 3 Define focal length? Question 4 Define principal foci? Question 5 Define first focal plane? Question 6 Define first principal focus? Question 7 Define second principal focus? Question 8 What do you mean by aperture of lens? Question 9 What are converging lenses? Question … [Read more...] about Lenses
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Question 1 What is a lens? Question 2 How many type of lens are them? Question 3 What is a convex lens? Question 4 What is a concave lens? Question 5 Draw Bi-convex,plane-convex and concavo-convex lens? Question 6 Draw Bi-concave,plane-concave and convexo-concave lens? Refraction by spherical lenses Lens is a transparent medium bounded by two refracting … [Read more...] about Refraction by spherical lenses
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Question 1 Define the term refraction of light? Question 2 Draw a diagram showing the bending of a ray of light when it travels from a rare medium to a denser medium? Question 3 State two laws of refraction? Question 4 What is the cause of refraction of light? Refraction of light The phenomenon of bending of light when they pass from one medium to another medium … [Read more...] about Refraction of light
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Question 1 What are the sign conventions for measuring the distances for spherical lens? Question 2 The image formed by concave lens is seen to be virtual,erect and highly diminished than the object.What is the position of the object? Question 3 Where should an object be placed in front of a concave lens so as to obtain image between focus and optical centre? Images … [Read more...] about Images formed by Concave lens
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Question 1 Where should an object be placed in front of a convex lens so as to obtain image on same side of lens? Question 2 The image formed by convex lens is seen to be real,inverted and diminished.What is the position of the object? Question 3 The image formed by convex lens is seen to be real,inverted and highly magnified.What is the position of the object? Image … [Read more...] about Images formed by convex lens
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Question 1 What is meant by lateral shift? Question 2 The refractive index of dense flint glass is 1.65 and for alcohol it is 1.36,with respect to air.What is the refractive index of the dense flint glass with respect to alcohol? Question 3 Draw a diagram showing refraction of light through a glass slab? Refraction through a Glass Slab n21 = Sin i / Sin … [Read more...] about Refraction through a Glass Slab
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Question 1 What are luminous objects.Give example? Question 2 What are non-luminous objects.Give example? Question 3 State the laws of reflection? Question 4 What is beam of light? Question 5 Define the term reflection of light? Question 6 What is a real image? Question 7 What is a virtual image? Question 8 Write the properties of images formed by plane … [Read more...] about Light-Reflection
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Question 1 Find the power of concave lens of focal length 2m? Question 2 Find the focal length of concave lens whose power is -2 D? Question 3 The power of lens is 2.5 D.What is the focal length and the type of lens? Question 4 A convex and concave lens of focal length 50 cm and 40 cm are combined together,what is the power of the combination? Question 5 What is … [Read more...] about Power and application of a lens
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Question 1 What is refractive index? Question 2 What is the speed of light in vacuum? Question 3 What is absolute refractive index? Question 4 What is relative refractive index? Question 5 What happen When light goes from rarer medium to denser medium? Question 6 What happen When light goes from denser medium to rarer medium? Question 7 On what factors does … [Read more...] about Refractive index
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Question 1 An object is placed at a distance of 10cm from a convex mirror of focal length 15cm.Find the position and nature of the image? Question 2 A concave mirror produces three times magnified real image of an object placed at 10cm in front of it.Where is the image located? Question 3 What are the sign conventions for a convex mirror? Question 4 What are the sign … [Read more...] about Mirror Formula