Lesson: Chapter - 18

Practice Questions
1. Which of the following has the shortest wavelength?

(A) Red light

(B) Blue light

(C) Gamma rays

(D) X rays

(E) Radio waves


2. Orange light has a wavelength of 6 × 10-7 m. What is its frequency? The speed of light is  3 × 108 m/s.
(A)  2 × 1015 Hz
(B)  2 × 10-15 Hz
(C)  5 × 1014 Hz
(D) 5 × 10-14 Hz
(E) 2 × 1014 Hz


3. When the orange light passes from air (n = 1) into glass (n = 1.5), what is its new wavelength?

(A) 4 × 10-7 m

(B) 4 × 10-6 m

(C) 2.5 × 10-7 m

(D) 6 × 10-7 m

(E) 9 × 10-7 m


div>
 
4. When a ray of light is refracted, the refracted ray does not have the same wavelength as the incident ray. Which of the following explain this phenomenon?
  I. Some of the energy of the incident ray is carried away by the reflected ray
 II. The boundary surface absorbs some of the energy of the incident ray
III. The incident and refracted rays do not travel with the same velocity
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I, II, and III

Questions 5 and 6 refer to a beam of light that passes through a sheet of plastic and out into the air. The angle the beam of light makes with the normal as it passes through the plastic is ° ?1, and the angle the beam of light makes with the normal as it passes into the air is ° ?2. The index of refraction for air is 1 and the index of refraction for plastic is 2.
5. What is the value of sin?2, in terms of ?1?

(A) 1/2sin?1

(B) 2 sin?1

(C) sin 2?1

(D) sin 1/2?1

(E) 4 sin?1


6. What is the minimum incident angle for which the light will undergo total internal reflection in the plastic?

(A) sin–1 1/4

(B) sin–1 1/2

(C) sin–1 2

(D) 0°

(E) 90°

7. A person’s image appears on the far side of an optical instrument, upside down. What is the optical instrument?

(A) Concave mirror

(B) Convex mirror

(C) Plane mirror

(D) Concave lens

(E) Convex lens

8. A physicist shines coherent light through an object, A, which produces a pattern of concentric rings on a screen, B. A is most likely:

(A) A polarization filter

(B) A single-slit

(C) A multiple-slit diffraction grating

(D) A prism

(E) A sheet with a pinhole


9. Sound waves do not exhibit polarization because, unlike light waves, they are not

(A) Longitudinal

(B) Coherent

(C) Dispersive

(D) Transverse

(E) Refractive


10. The solar glare of sunlight bouncing off water or snow can be a real problem for drivers. The reflecting sunlight is horizontally polarized, meaning that the light waves oscillate at an angle of 90° to a normal line drawn perpendicular to the Earth. At what angle relative to this normal line should sunglasses be polarized if they are to be effective against solar glare?

(A) 0°

(B) 30°

(C) 45°

(D) 60°

(E) 90°
Back Next

Next to display next topic in the chapter.

Practice Questions

Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

SAT Reasoning GRE General GMAT Test
More for You
MCQ with question Explanations Scholarships and Financial Aid

NTS GAT General Preparation

Prepare NTS GAT General paper-base and online

Arithmetic

Lessons on Basic to Advance Arithmetic with practice questions

Biology for Test Preparation

Prepare Biology for tests with lessons and practice mcq

All in this Category

You may be interested in

Colleges in karachi

A comprehensive list of major colle ...

Colleges in Lahore

Find a comprehensive list of major ...

Study in Canada

How to get opportunity to study in ...

Pakistan Study Visa

How you can get study visa to Pakis ...

CSS Exam

All about the preliminary requireme ...

GRE Chemistry

Complete review of GRE Chemistry wi ...

NED Engineering Degrees

NED University of Engineering and t ...

KEMU King Edward Medical University

King Edward Medical University is a ...

About us

EntryTest.com is a test preparation service for students seeking successful career.

About Disclaimer

Quick Test Prep

NUST NET IBA Karachi SAT LUMS LCAT LSE

 

NTS GAT NTS NAT GMAT GRE ACT

Study Abroad

Education Abroad Business Schools MS in USA