Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

2,237.

An image which can be formed on a screen is said to be

A.

virtual

B.

blurred

C.

inverted

D.

erect

E.

real

Correct answer is E

No explanation has been provided for this answer.

2,238.

Calculate the refractive index of the material of the glass block shown in the diagram if YZ = 4cm

A.

0.40

B.

0.60

C.

1.50

D.

1.67

E.

2.50

Correct answer is D

n = \(\frac{\text{real depth}}{\text {apparent depth}}\)

\(\frac{10}{10^{-4}}\) = 1.6

2,239.

A ray of light is incident at an angle of 30o on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism. (The medium surrounding the prism is air)

A.

10.5o

B.

19.5o

C.

21.1o

D.

38.9o

E.

40.5o

Correct answer is A

n = \(\frac{sin i}{sin r}\)

sin r = \(\frac{30^o}{n}\)

sin r = \(\frac{0.5}{1.5}\)

sin r = 0.3333

r = 19.5o; Deviation 30 - 19.5 = 10.5o

2,240.

In the arrangement illustrated above, Y and B are yellow and blue transparent light filters respectively. The white object through the filters is

A.

blue

B.

red

C.

yellow

D.

green

E.

black

Correct answer is E

No explanation has been provided for this answer.