1
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Red light differs from blue light as they have :
A
Different frequencies and same wavelengths
B
Different frequencies and different wavelengths
C
Same frequencies and different wavelengths
D
Same frequencies and same wavelengths
2
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The angle of deviation through a prism is minimum when

JEE Main 2021 (Online) 16th March Morning Shift Physics - Geometrical Optics Question 101 English
(A) Incident ray and emergent ray are symmetric to the prism.

(B) The refracted ray inside the prism becomes parallel to its base

(C) Angle of incidence is equal to that of the angle of emergence

(D) When angle of emergence is double the angle of incidence

Choose the correct answer from the options given below :
A
Statements (B) and (C) are true
B
Only statements (A) and (B) are true
C
Statements (A), (B) and (C) are true
D
Only statement (D) is true
3
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The incident ray, reflected ray and the outward drawn normal are denoted by the unit vectors $$\overrightarrow a $$, $$\overrightarrow b $$ and $$\overrightarrow c $$ respectively. Then choose the correct relation for these vectors.
A
$$\overrightarrow b $$ = $$\overrightarrow a $$ + 2$$\overrightarrow c $$
B
$$\overrightarrow b $$ = $$\overrightarrow a $$ $$-$$ 2 ($$\overrightarrow a $$ . $$\overrightarrow c $$)$$\overrightarrow c $$
C
$$\overrightarrow b $$ = 2$$\overrightarrow a $$ + $$\overrightarrow c $$
D
$$\overrightarrow b $$ = $$\overrightarrow a $$ $$-$$ $$\overrightarrow c $$
4
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements : one is labeled as Assertion A and the other is labeled as Reason R.

Assertion A : For a simple microscope, the angular size of the object equals the angular size of the image.

Reason R : Magnification is achieved as the small object can be kept much closer to the eye than 25 cm and hence it subtends a large angle.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
A is true but R is false
B
A is false but R is true
C
Both A and R are true and R is the correct explanation of A
D
Both A and R are true but R is NOT the correct explanation of A
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