Wave Optics Test

Result

Wave Optics Test - 48

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Weekly Quiz Competition

Question 1
4 / -1

The region of the atmosphere above troposphere is known as

A
Lithosphere

B
Uppersphere

C
Ionosphere

D
Stratosphere
Question 2
4 / -1

Which of the following electromagnetic waves have minimum frequency?

A
Microwaves

B
Audible waves

C
Ultrasonic waves

D
Radiowaves
Question 3
4 / -1

Which one of the following have minimum wavelength?

A
Ultraviolet rays

B
Cosmic rays

C
X-rays

D
y-rays
Question 4
4 / -1

Radiations of intensity 0.5 W/m² are striking a metal plate. The pressure on the plate is

A
0.166 × 10^–8 N / m²

B
0.332 × 10^–8 N / m²

C
0.111 × 10^–8 N / m²

D
0.083 × 10^–8 N / m²

Solution
Question 5
4 / -1

Electromagnetic waves travel in a medium which has relative permeability 1.3 and relative permittivity 2.14. Then the speed of the electromagnetic wave in the medium will be

A
13.6 × 10⁶ m/s

B
1.8 × 10² m/s

C
3.6 × 10⁸ m/s

D
1.8 × 10⁸ m/s

Solution
Question 6
4 / -1

A
18 mm

B
12 mm

C
6 mm

D
9 mm

Solution
Question 7
4 / -1

Infrared radiation was discovered in 1800 by

A
William Wollaston

B
William Herschel

C
Wilhelm Roentgen

D
Thomas Young
Question 8
4 / -1

Which of the following is electromagnetic wave?

A
X-rays and light waves

B
Cosmic rays and sound waves

C
Beta rays and sound waves

D
Alpha rays and sound waves
Question 9
4 / -1

A
y-axis

B
x-axis

C
+z-axis

D
–z axis

Solution
Question 10
4 / -1

If c is the speed of electromagnetic waves in vacuum, its speed in a medium of dielectric constant K and relative permeability µ_r is

A

B

C

D

Solution