Physics - Mock Test 36

Question 351

Michelson devised the formula to calculate the speed of light?

A) C = 4fd B) C = 8fd C) C = 16fd D) C = 5/2fd

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Question 352

Michelson calculated the speed of light using the instruments?

A) spectrometer B) galvanometer C) interferometer D) none of these

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Question 353

A convex lens acts as a diverging lens if the?

A) object is beyond C B) if the object is with in C C) if the object is within f D) both b and c

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Question 354

The equation ?min = 1.22 ?/D was devised by ?

A) Newton B) Einstein C) Raleigh D) Planks

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Question 355

Magnification of the astronomical telescope is?

A) fo+fe B) fo/fe C) fe/fo D) (1+fo/fe)L/fo

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Question 356

In optic fiber transmission system __________ are used regenerate the dim light signal?

A) Diodes B) Repeaters C) Laser D) Transformer

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Question 357

The value of critical angle for glass is?

A) 42? B) 47? C) 52? D) 50?

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Question 358

A convex and concave lens of focal length f are in contact the focal length of the combinations will be?

A) zero B) f / 2 C) 2f D) infinite

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Question 359

If a convex lens of focal length f is cut into two identical halves along the lens diameter the focal length of each half is?

A) f B) f/2 C) 2f D) 3f/2

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Question 360

A spectrometer is used to find?

A) wave length of light B) refractive index of the prism C) wavelength of different colours D) all of the above

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