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CBSE - X - History

Explain the following concepts 1.Dialectics 

Asked by lr9539809 19th March 2019, 10:52 PM
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CBSE - X - History

Explain the following concepts 1.Dialectics 

Asked by lr9539809 19th March 2019, 10:51 PM
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CBSE - X - Physics

An object of size 3.0 cm is placed 14 cm in front of a concave lens of focal length 21 cm. Describe the image produced by the lens. What happens if the object is moved further away from the lens?

Asked by rushabh1234 19th March 2019, 8:33 PM
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CBSE - X - Physics

Can the absolute value of refractive index of a medium be less than unity ? Why or why not ?

Asked by rushabhjain.avv 19th March 2019, 8:07 PM
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CBSE - X - Physics

A dentist uses a small concave mirror of focal length 16mm to view a cavity in the tooth of a patient  by holding the mirror at a distance of 8mm from the cavity. Calculate the magnification

Asked by rushabhjain.avv 19th March 2019, 8:02 PM
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CBSE - X - Physics

Show that for a concave mirror, a virtual object forms a real image which is always diminished?

Asked by rushabhjain.av 19th March 2019, 7:58 PM
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CBSE - X - Physics

How is the focal length of a spherical mirror affected when the wavelength of the light used is increased?

Asked by rushabhjain.av 19th March 2019, 7:53 PM
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CBSE - X - Mathematics

A lens behaves as a converging lens in air and a diverging lens in water (g = 4/3). What will be the condition on the value of refractive index (g) of the material of the lens? 

Asked by rushabhjain.a 19th March 2019, 7:27 PM
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CBSE - X - Physics

The refractive index of diamond is much greater than that of glass. How does a diamond cutter make use of this fact? 

Asked by rushabhjain.a 19th March 2019, 7:23 PM
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