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Define lens equation or formula. Also write its equation.

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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1 answer 165 views

Why we take the principal focus of a concave mirror as real and a convex mirror as virtual?

asked Oct 17, 2017 in Physics by shamroz (41.5k points)

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1 answer 125 views

Define the term accommodation. How defects in accommodation be corrected?

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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1 answer 205 views

Differentiate between noise and musical sounds. Also give examples.

asked Oct 17, 2017 in Physics by shamroz (41.5k points)

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1 answer 204 views

Suppose you and your friend are on the moon. Can you be able to hear any sound produced by your friend?

asked Oct 17, 2017 in Physics by sonia (36.5k points)

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1 answer 124 views

How does a slide projector or movie projector work? Explain.

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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1 answer 121 views

What is optical fibres?

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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1 answer 120 views

What is meant by the terms nearsightedness and farsightedness. How these defects can be corrected?

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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1 answer 200 views

Explain that noise is a nuisance.

asked Oct 17, 2017 in Physics by shamroz (41.5k points)

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1 answer 238 views

The result you have noted is only because of the carbon dioxide

asked Oct 16, 2017 in English by sonia (36.5k points)

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1 answer 204 views

What types of waves do not require any material medium for their propagation?

asked Oct 16, 2017 in Physics by shamroz (41.5k points)

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1 answer 233 views

The breathing becomes rapid and deep after exercise. Why?

asked Oct 16, 2017 in English by shamroz (41.5k points)

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1 answer 152 views

Why a concave mirror is used for makeup or shaving?

asked Oct 17, 2017 in Physics by shamroz (41.5k points)

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1 answer 1.3k views

Give the balanced equation for the hydrolysis of sucrose.

asked Sep 21, 2017 in Chemistry by shamroz (41.5k points)

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1 answer 70 views

Under what conditions will a converging lens form a real image that is the same size as the object?

asked Oct 19, 2017 in Physics by shamroz (41.5k points)

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1 answer 109 views

Explain the image formation with ray diagram, when the object is placed between the convex lens and F.

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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1 answer 108 views

Write the construction and working of a camera.

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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1 answer 144 views

Why ultrasound is useful in medical field.

asked Oct 17, 2017 in Physics by sonia (36.5k points)

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1 answer 143 views

Define spherical mirrors. What are its types?

asked Oct 17, 2017 in Physics by shamroz (41.5k points)

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1 answer 106 views

Explain the image formation with ray diagram, when the object is placed at F (focal point) of a convex lens.

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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